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Business Development Manager
Radiant · El Segundo, California, United States
$160k–236k
70 days ago
♡
Supply Reliability Engineer
Radiant · El Segundo, California, United States
$100k–143k
70 days ago
♡
Senior Manager, Power Systems
Radiant · El Segundo, California, United States
$208k–284k
70 days ago
♡
Reactor Operations Training Specialist
Radiant · El Segundo, California, United States
$150k–208k
72 days ago
♡
Reactor Operations Training Specialist
Radiant · El Segundo, California, United States
$150k–208k
72 days ago
♡
Facilities Technician - Electrical
Radiant · El Segundo, California, United States
$33–41/hr
73 days ago
♡
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Business Development Manager
Radiant · El Segundo, California, United States
Pay
$160k–236k
Setting
On-site
ABOUT RADIANT
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
Business Development Manager
Radiant is hiring a Business Development Manager to be based out of El Segundo, California. Reporting to the Chief Commercial Officer, this role is for someone in the growth stage of their BD career who is hungry, scrappy, and tenacious in the pursuit of pipeline development.
At Radiant, we have a well developed product/market fit and are looking to add outstanding originators to further grow our commercial pipeline. The successful candidate must come with a proven track record of originating B2B deals without warm leads. We need someone who can independently identify potential customers, get in the door, and drive commercial conversations forward in a market we are creating.
This is fundamentally a sales role for someone who wants to make something new exist in the world. If you are competitive, curious, and want to do some of the most meaningful commercial work of your career, we want to hear from you.
Responsibilities and Duties:
- Independently source and qualify leads across commercial verticals primarily across Fortune 500 companies.
- Originate and then lead client conversations from first contact through discovery, proposal, and term sheet.
- Working with executive leadership, support negotiation of commercial documents toward binding agreements.
- Build and maintain a pipeline independently, with an emphasis on quality over volume.
- Develop tailored proposals and external communications.
- Learn the fundamentals of the product itself as well as siting, licensing, and utility energy well enough to speak credibly with customers and identify what it takes to get a deal across the finish line.
- Act as an ambassador for Radiant's mission, values, and brand in every customer interaction.
Required Skills and Qualifications:
- Demonstrated ability to source national (vs. regional) opportunities independently, not just manage inbound leads. This is fundamental. You must have this.
- Bachelor's degree from an accredited institution.
- 3-5 years of experience in business development, sales, or a related commercial role.
- Excellent verbal and written communication.
- US Citizen or green card holder.
- Ability to travel and attend in-person meetings.
Desired Skills and Qualifications:
- MBA from top tier school.
- Big 3 management consulting experience can be a plus, if paired with additional direct work in execution.
- Experience selling or developing business around complex hardware or infrastructure with fairly long deal timelines.
- A genuine competitive streak and a track record of doing things that were hard to do.
- Passion for nuclear energy and its role in a carbon-free future.
Additional Requirements:
- Must be willing to work extended hours and weekends as needed.
- Must be willing to travel for short trips (paneling conferences, customer meetings, etc.) 2 to 3 times per month.
- Must work 100% onsite at El Segundo HQ (not negotiable)
BENEFITS AND PERKS
- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Supply Reliability Engineer
Radiant · El Segundo, California, United States
Pay
$100k–143k
Setting
On-site
ABOUT RADIANT
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
THE ROLE
We are looking for a Supply Reliability Engineer who builds supplier programs that prevent problems rather than react to them. You will own the development, qualification, and long-term reliability of Radiant's supply base — establishing the processes, standards, and supplier capabilities that ensure the right part arrives to the right standard, every time. While you'll have the technical depth to handle non-conformances and corrective actions when they arise, your primary focus is upstream: strengthening supplier processes, closing capability gaps, and building a supply base that performs without constant intervention.
This is a builder role: the old house is being brought down, and a new foundation is being poured, but we still need to build the structure, apply the finishes, and pass final inspection. You'll own what exists, upgrade aging systems, and create something the industry hasn't seen before.
We're not here to maintain the status quo in nuclear quality — we're here to raise the bar. Radiant is building a supplier reliability program from the ground up with a singular goal: the right part, to the right standard, on time, every time. If you want to do the most meaningful quality work of your career in an industry that hasn't been disrupted in decades, this is that opportunity.
Responsibilities & Duties:
- Own the supplier qualification and onboarding process end-to-end — pre-assessments, capability reviews, audit execution, and formal approval to the Approved Supplier List.
- Own, refine, and expand quality program documentation — including quality clauses, commodity-specific requirements, and the Supplier Quality Manual — building on existing foundations and authoring what doesn't yet exist.
- Develop supplier capability improvement plans — identify process gaps, partner with suppliers to close them, and track progress against defined milestones before problems reach Radiant's dock.
- Own Radiant's procurement assurance and acceptance framework — define how items are accepted across supplier types and quality levels, establish purchase order quality requirements, certifications, material traceability, and compliance documentation, and build toward a graded, systematized model.
- Execute supplier audits and manage supplier performance — audit against Radiant quality program requirements, author findings to closure, and drive structured improvement plans with emphasis on early intervention over lagging indicators.
- Partner cross-functionally with design engineering, manufacturing, and materials teams to translate technical requirements into supplier-facing quality requirements before parts are ordered.
- Process and disposition supplier quality issues when they arise — deviation requests, non-conformance reports, supplier corrective action requests, root cause analysis, and verification of corrective action effectiveness.
Required Qualifications & Skills:
- Bachelor's degree in Engineering, Quality, Materials Science, or a related technical field
- 3–6 years of hands-on experience in supplier quality, supplier development, or supplier reliability engineering in a regulated industry (nuclear, aerospace, defense, or medical device)
- Demonstrated ability to independently process supplier quality transactions: deviation requests, non-conformance reports, supplier corrective action requests, purchase order quality reviews, and cert package review — without step-by-step guidance
- Proven experience owning or drafting quality program documents: quality clauses, supplier requirements, inspection instructions, or equivalent
- Working knowledge of ISO 9001, AS9100, or equivalent quality management systems, including supplier audit methods and corrective action management
Desired Qualifications & Skills:
- Experience in the nuclear industry or direct familiarity with NQA-1, 10 CFR 50 Appendix B, 10 CFR 21, ASME BPVC Section III and/or VIII
- Manufacturing process depth in one or more of the following: machining, welding, casting, forming, special processes, or precision fabrication — sufficient to audit a supplier's process controls and identify gaps
- Certified NQA-1 Lead Auditor, or documented progress toward certification
- Qualified Inspector status (ASME Section III) or working toward it
- Exposure to ISO 17025 accredited laboratories or third-party inspection bodies
- Experience at an early-stage company or program where processes were built or advanced, not inherited
Who You Are:
- You take full ownership of your domain — you identify what needs to be built or improved, write the procedure when one doesn't exist, and drive it without waiting to be asked.
- You solve problems from first principles — when a standard doesn't map cleanly to the situation, you reason from the underlying requirement rather than defaulting to precedent or guesswork.
- Attention to detail is non-negotiable — in a safety-critical, auditable environment, imprecision in a quality record, a clause, or an audit finding has real downstream consequences.
- You hold suppliers — and yourself — to a high standard, and you're energized by preventing failures rather than resolving them — you'd rather fix the supplier's process than write the corrective action.
- You care about the mission: bringing clean, reliable energy to places that need it most, and you understand that quality in this industry is not bureaucratic overhead — it's a safety imperative.
- You thrive in a fast-paced, resource-constrained environment where the work is hard and the stakes are real.
Additional Requirements:
- Must be willing to work extended hours and weekends as necessary to accomplish our mission.
- Must work 100% onsite at El Segundo HQ.
BENEFITS AND PERKS
- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior Manager, Power Systems
Radiant · El Segundo, California, United States
Pay
$208k–284k
Setting
On-site
ABOUT RADIANT
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
ABOUT THE ROLE
Radiant is seeking a talented Senior Manager, Power Systems, to build and lead the team that designs, models, and validates electrical power systems for our nuclear microreactor platform. You will manage a team of power systems and power electronics engineers, set technical direction and priorities, and ensure the team delivers safe, stable, and reliable power across grid-connected, islanded, rapidly deployable, and space-based environments.
In this role, you will guide your team through power system studies from early architecture tradeoffs through detailed modeling, testing, and system validation, while also driving the development of in-house power electronics, including converters, inverters, and generator controls, needed to support both terrestrial and space-based reactor platforms. This role is central to commercializing Earth's first mass-produced portable nuclear reactors, and to extending that capability beyond Earth.
RESPONSIBILITIES & DUTIES
- Build, manage, and grow a team of power systems and power electronics engineers, including hiring, mentoring, and performance management.
- Set team priorities and roadmaps in partnership with leadership from power conversion, controls, nuclear, and software.
- Communicate progress, risks, and results to executive leadership and cross-functional stakeholders.
- Lead the team that owns power system architecture, single-line diagrams, and synchronization strategy for single and multi-reactor configurations, grid-connected and islanded.
- Direct FMEAs and disturbance analysis (load steps, faults, breaker operations, loss-of-generation) to validate system stability and protection behavior.
- Own architecture, sizing, and integration of off-the-shelf hardware for energy storage and power conversion.
- Lead in-house power electronics development (converters, inverters, generator controls) to support earth and space-based reactor platforms.
- Oversee SIL/HIL and system-level testing, commissioning, and regulatory/power-quality compliance.
REQUIRED QUALIFICATIONS & SKILLS
- B.S. in Electrical Engineering with an emphasis in power systems or control systems.
- 8+ years of experience designing power systems for generation, microgrids, or mission-critical power systems.
- 3+ years of experience in a formal people management role.
- Experience with sizing and integrating high-voltage battery systems with power electronics.
- Track record developing power electronics for high-power, medium-voltage equipment, including transformers, switchgear, inverters, active rectifiers, DC/DC converters, and generator controls.
- Background in leading teams with power system modeling and simulation tools (e.g., PSCAD, ETAP, PSS®E, Simulink, or equivalent).
- Solid understanding of power system control modes (grid-forming, grid-following, droop control).
- Experience in analyzing system stability, protection behavior, and fault response in complex electrical systems.
- Proven ability to lead and develop engineering teams while remaining technically hands-on.
- Ability to clearly communicate technical concepts and results to cross-functional teams and leadership.
DESIRED QUALIFICATIONS & SKILLS
- M.S. in Electrical Engineering or related discipline.
- 5+ years of experience in a formal people management role.
- Experience with islanded power systems supporting critical loads.
- Familiarity with interconnection requirements, grid codes, and relevant IEEE or utility standards.
- Experience in modeling dynamic loads and fast-changing electrical demand.
- Exposure to nuclear, aerospace, defense, or other highly regulated industries.
- Track record of building or scaling an engineering team on complex, safety-critical programs.
ADDITIONAL REQUIREMENTS
- Must be willing to work extended hours and weekends as necessary to accomplish our mission.
- Must work 100% onsite at Radiant's El Segundo HQ.
BENEFITS AND PERKS
- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
CNC Machinist
Radiant · El Segundo, California, United States
Pay
$45–61/hr
Setting
On-site
CNC Machinist
Location
El Segundo, CA
Employment Type
Full time
Location Type
On-site
Department
Engineering
Production & Manufacturing
Compensation
$45 – $61 per hour • Offers Equity
Overview
Application
About Radiant
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
CNC Machinist
Radiant is seeking an CNC Programmer and Machinist who will contribute to the development of our microreactor unit. You’ll be a key contributor to Radiant, programming, setting up, and operating CNC machines to produce precision components that power our most critical systems. You’ll translate engineering designs into high-quality, manufacturable parts ensuring accuracy, efficiency, and innovation at every step.
This role requires hands-on experience with CNC machining, a deep understanding of G-code and CAM software, and a passion for solving complex manufacturing challenges. You’ll work closely with engineers, machinists, and quality teams to push the limits of what’s possible in precision manufacturing.
Responsibilities and Duties:
Develop and optimize CNC programs for 3-axis, 4-axis, and 5-axis mills, lathes, and multi-axis machining centers.
Set up and operate CNC equipment to validate new programs and processes.
Read and interpret complex engineering drawings, 3D models, and GD&T specifications.
Collaborate with design and manufacturing engineers to improve part manufacturability and reduce cycle times.
Select proper tooling, workholding, and cutting parameters for a variety of materials (aluminum, titanium, stainless steel, Inconel, etc.).
Troubleshoot machining and programming issues on the floor to maintain high-quality output and machine uptime.
Continuously improve machining processes through data-driven feedback and experimentation.
Maintain adherence to safety and quality standards across all machining operations.
Support additional technician duties or cross-functional shop activities as needed based to achieve company priorities.
Required Skills and Qualifications:
5+ years of experience in CNC machining and programming in a precision manufacturing or aerospace environment.
Proficiency in CAM software (e.g., Mastercam, Siemens NX, Fusion 360, or CATIA).
Strong understanding of G-code, M-code, feeds, speeds, and toolpath strategies.
Hands-on experience setting up and operating mills, lathes, and multi-axis machining centers.
Ability to interpret complex technical drawings, GD&T, and 3D CAD models.
Proven ability to take a part from print to finished component.
Strong problem-solving skills and attention to detail.
Desired Skills and Qualifications:
Experience with 5-axis machining and post-processor development.
Familiarity with aerospace or high-performance hardware manufacturing.
Experience with exotic materials (e.g., titanium, Inconel, carbon composites).
Working knowledge of ERP/MES systems and digital manufacturing workflows.
Additional Requirements:
Must be willing to work extended hours and weekends as necessary to achieve company goals.
Must work 100% onsite at El Segundo HQ.
Benefits and Perks
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
One Medical: Sponsored memberships for employees and their dependents.
Vision: 100% top tier plan coverage + 50% for dependents.
Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
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Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
CNC Machinist
Radiant · El Segundo, California, United States
Pay
$45–61/hr
Setting
On-site
ABOUT RADIANT
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
CNC Machinist
Radiant is seeking an CNC Programmer and Machinist who will contribute to the development of our microreactor unit. You’ll be a key contributor to Radiant, programming, setting up, and operating CNC machines to produce precision components that power our most critical systems. You’ll translate engineering designs into high-quality, manufacturable parts ensuring accuracy, efficiency, and innovation at every step.
This role requires hands-on experience with CNC machining, a deep understanding of G-code and CAM software, and a passion for solving complex manufacturing challenges. You’ll work closely with engineers, machinists, and quality teams to push the limits of what’s possible in precision manufacturing.
Responsibilities and Duties:
- Develop and optimize CNC programs for 3-axis, 4-axis, and 5-axis mills, lathes, and multi-axis machining centers.
- Set up and operate CNC equipment to validate new programs and processes.
- Read and interpret complex engineering drawings, 3D models, and GD&T specifications.
- Collaborate with design and manufacturing engineers to improve part manufacturability and reduce cycle times.
- Select proper tooling, workholding, and cutting parameters for a variety of materials (aluminum, titanium, stainless steel, Inconel, etc.).
- Troubleshoot machining and programming issues on the floor to maintain high-quality output and machine uptime.
- Continuously improve machining processes through data-driven feedback and experimentation.
- Maintain adherence to safety and quality standards across all machining operations.
- Support additional technician duties or cross-functional shop activities as needed based to achieve company priorities.
Required Skills and Qualifications:
- 5+ years of experience in CNC machining and programming in a precision manufacturing or aerospace environment.
- Proficiency in CAM software (e.g., Mastercam, Siemens NX, Fusion 360, or CATIA).
- Strong understanding of G-code, M-code, feeds, speeds, and toolpath strategies.
- Hands-on experience setting up and operating mills, lathes, and multi-axis machining centers.
- Ability to interpret complex technical drawings, GD&T, and 3D CAD models.
- Proven ability to take a part from print to finished component.
- Strong problem-solving skills and attention to detail.
Desired Skills and Qualifications:
- Experience with 5-axis machining and post-processor development.
- Familiarity with aerospace or high-performance hardware manufacturing.
- Experience with exotic materials (e.g., titanium, Inconel, carbon composites).
- Working knowledge of ERP/MES systems and digital manufacturing workflows.
Additional Requirements:
- Must be willing to work extended hours and weekends as necessary to achieve company goals.
- Must work 100% onsite at El Segundo HQ.
BENEFITS AND PERKS
- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Reactor Operations Training Specialist
Radiant · El Segundo, California, United States
Pay
$150k–208k
Setting
On-site
About Radiant
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
About the Role
Radiant is seeking a Reactor Operations Training Specialist to play a critical role in enabling safe, scalable operations for the line of Kaleidos reactors. In this role, you will be responsible for building Reactor Operator training resources to enable timely and effective training and certification of operators. This role goes beyond traditional documentation, requiring close, daily collaboration with operators, engineers, and test teams to rapidly translate emerging system knowledge into clear, actionable content. This role may also support engineering operations through the development of test plans, data reviews, and other key technical documentation needed to move from prototype to commercial deployment.
Responsibilities & Duties:
Develop and continuously refine Reactor Operator training materials, including operator manuals, learning objectives, lesson plans, operating procedures, and evaluation tools.
Direct experience with nuclear systems, reactor operations, or operator training programs.
Maintain records of operator qualification to DOE/NRC standards. Translate evolving reactor designs and operational concepts into clear, concise, and easily understood training content.
Embed with engineering, test, and operations teams to capture real-time technical insights and lessons learned and reflect them in documentation.
Establish and maintain documentation standards, templates, and style guides suited for a fast-paced startup environment.
Manage document lifecycles within configuration-controlled systems, including version control, change tracking, and rapid updates.
Balance speed and rigor to ensure documentation supports both rapid development and regulatory expectations.
Capture operational lessons learned and support development of regulatory documents, to include white papers and topical reports.
Required Qualifications & Skills:
Bachelor’s degree in Engineering, Physics, Technical Communication, or a related technical discipline.
2+ years of technical writing experience in a complex, engineering-driven environment (e.g., nuclear, aerospace, energy, or advanced hardware).
Familiarity with complex systems and the ability to distill them into operator-focused training content through both written and verbal mediums.
Ability to deliver instructional material in both group and one-on-one classroom environments.
Ability to read and interpret engineering drawings, specifications and procedures.
Ability to work with incomplete or evolving technical information and produce clear, accurate documentation.
Experience developing training materials, technical references, or test documentation.
Strong collaboration skills and comfort working directly with engineers and operators in a dynamic setting.
Familiarity with document control and configuration management principles.
Desired Qualifications & Skills:
Background in instructional design or building technical training programs
Familiarity with NRC or DOE regulatory instructions and licensing considerations for commercial reactors.
Ability to operate with a high degree of ownership and autonomy in an evolving organizational structure.
Additional Requirements:
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.
Benefits and Perks
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
One Medical: Sponsored memberships for employees and their dependents.
Vision: 100% top tier plan coverage + 50% for dependents.
Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Reactor Operations Training Specialist
Radiant · El Segundo, California, United States
Pay
$150k–208k
Setting
On-site
ABOUT RADIANT
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
ABOUT THE ROLE
Radiant is seeking a Reactor Operations Training Specialist to play a critical role in enabling safe, scalable operations for the line of Kaleidos reactors. In this role, you will be responsible for building Reactor Operator training resources to enable timely and effective training and certification of operators. This role goes beyond traditional documentation, requiring close, daily collaboration with operators, engineers, and test teams to rapidly translate emerging system knowledge into clear, actionable content. This role may also support engineering operations through the development of test plans, data reviews, and other key technical documentation needed to move from prototype to commercial deployment.
Responsibilities & Duties:
- Develop and continuously refine Reactor Operator training materials, including operator manuals, learning objectives, lesson plans, operating procedures, and evaluation tools.
- Direct experience with nuclear systems, reactor operations, or operator training programs.
- Maintain records of operator qualification to DOE/NRC standards. Translate evolving reactor designs and operational concepts into clear, concise, and easily understood training content.
- Embed with engineering, test, and operations teams to capture real-time technical insights and lessons learned and reflect them in documentation.
- Establish and maintain documentation standards, templates, and style guides suited for a fast-paced startup environment.
- Manage document lifecycles within configuration-controlled systems, including version control, change tracking, and rapid updates.
- Balance speed and rigor to ensure documentation supports both rapid development and regulatory expectations.
- Capture operational lessons learned and support development of regulatory documents, to include white papers and topical reports.
Required Qualifications & Skills:
- Bachelor’s degree in Engineering, Physics, Technical Communication, or a related technical discipline.
- 2+ years of technical writing experience in a complex, engineering-driven environment (e.g., nuclear, aerospace, energy, or advanced hardware).
- Familiarity with complex systems and the ability to distill them into operator-focused training content through both written and verbal mediums.
- Ability to deliver instructional material in both group and one-on-one classroom environments.
- Ability to read and interpret engineering drawings, specifications and procedures.
- Ability to work with incomplete or evolving technical information and produce clear, accurate documentation.
- Experience developing training materials, technical references, or test documentation.
- Strong collaboration skills and comfort working directly with engineers and operators in a dynamic setting.
- Familiarity with document control and configuration management principles.
Desired Qualifications & Skills:
- Background in instructional design or building technical training programs
- Familiarity with NRC or DOE regulatory instructions and licensing considerations for commercial reactors.
- Ability to operate with a high degree of ownership and autonomy in an evolving organizational structure.
Additional Requirements:
- Must be willing to work extended hours and weekends as necessary to accomplish our mission.
- Must work 100% onsite at El Segundo HQ.
BENEFITS AND PERKS
- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Facilities Technician - Electrical
Radiant · El Segundo, California, United States
Pay
$33–41/hr
Setting
On-site
Facilities Technician - Electrical
Location
El Segundo, CA
Employment Type
Full time
Location Type
On-site
Department
Operations
Compensation
$33 – $41 per hour • Offers Equity
Overview
Application
About Radiant
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
About the Role:
The Electrical Facilities Technician will serve as the primary electrical resource for Radiant’s facilities and infrastructure. This role is responsible for maintaining, troubleshooting, repairing, and upgrading building electrical systems while also supporting general facilities maintenance, construction projects, and workplace operations.
This position will partner closely with Facilities & Capital Projects leadership, contractors,
engineers, and internal stakeholders to ensure our facilities remain safe, reliable, and
operational. The ideal candidate is a hands-on problem solver who is comfortable performing electrical work while also supporting broader facility maintenance needs in a dynamic startup environment.
Responsibilities & Duties:
Serve as the primary in-house resource for electrical troubleshooting and repairs.
Install, maintain, and repair lighting systems, electrical panels, breakers, receptacles,
circuits, emergency lighting systems, and low-voltage systems.
Diagnose electrical issues and implement corrective actions.
Support electrical upgrades and facility expansion projects.
Coordinate and oversee electrical subcontractors when specialized work is required.
Assist with lockout/tagout (LOTO) procedures and electrical safety compliance.
Perform general building maintenance and repair tasks.
Support HVAC troubleshooting and vendor coordination.
Perform basic plumbing repairs and facility upkeep.
Repair doors, hardware, ceilings, flooring, and building fixtures.
Respond to facility emergencies and urgent maintenance requests.
Maintain facility tools, equipment, and maintenance inventories.
Support parking lot, exterior grounds, and workplace appearance initiatives.
Assist with workplace moves, furniture installations, and office improvements.
Support facility improvement projects, contractor coordination, and project execution.
Participate in safety audits, inspections, and continuous improvement initiatives.
Required Qualifications & Skills:
3+ years of commercial, industrial, manufacturing, or facilities electrical experience.
Working knowledge of electrical distribution systems and troubleshooting.
Ability to read and interpret electrical schematics, construction drawings, and equipment manuals.
Experience operating power tools and maintenance equipment.
Ability to lift up to 50 pounds and work on ladders, lifts, and rooftops as needed.
Valid driver’s license.
Desired Qualifications & Skills:
Electrician certification or equivalent experience.
Experience in manufacturing, aerospace, energy, nuclear, semiconductor, or industrial
facilities.
Experience supporting facility construction projects.
Knowledge of HVAC systems and building automation systems (BAS).
Forklift, scissor lift, and boom lift experience.
Experience with CMMS systems.
Understanding of OSHA and NFPA 70E electrical safety requirements.
Experience working in a startup environment.
Success in the First 3 Months:
Become the primary point of contact for facility electrical issues.
Reduce dependency on outside electrical contractors for routine work.
Establish preventative maintenance plans for key facility systems.
Improve facility response times for maintenance requests.
Support ongoing facility improvement and capital projects.
Identify cost-saving opportunities through in-house execution of electrical and maintenance work.
Additional Requirements:
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.
Benefits and Perks
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
One Medical: Sponsored memberships for employees and their dependents.
Vision: 100% top tier plan coverage + 50% for dependents.
Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Apply for this Job
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Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Facilities Technician - Electrical
Radiant · El Segundo, California, United States
Pay
$33–41/hr
Setting
On-site
ABOUT RADIANT
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
About the Role:
The Electrical Facilities Technician will serve as the primary electrical resource for Radiant’s facilities and infrastructure. This role is responsible for maintaining, troubleshooting, repairing, and upgrading building electrical systems while also supporting general facilities maintenance, construction projects, and workplace operations.
This position will partner closely with Facilities & Capital Projects leadership, contractors,
engineers, and internal stakeholders to ensure our facilities remain safe, reliable, and
operational. The ideal candidate is a hands-on problem solver who is comfortable performing electrical work while also supporting broader facility maintenance needs in a dynamic startup environment.
Responsibilities & Duties:
- Serve as the primary in-house resource for electrical troubleshooting and repairs.
- Install, maintain, and repair lighting systems, electrical panels, breakers, receptacles,
circuits, emergency lighting systems, and low-voltage systems.
- Diagnose electrical issues and implement corrective actions.
- Support electrical upgrades and facility expansion projects.
- Coordinate and oversee electrical subcontractors when specialized work is required.
- Assist with lockout/tagout (LOTO) procedures and electrical safety compliance.
- Perform general building maintenance and repair tasks.
- Support HVAC troubleshooting and vendor coordination.
- Perform basic plumbing repairs and facility upkeep.
- Repair doors, hardware, ceilings, flooring, and building fixtures.
- Respond to facility emergencies and urgent maintenance requests.
- Maintain facility tools, equipment, and maintenance inventories.
- Support parking lot, exterior grounds, and workplace appearance initiatives.
- Assist with workplace moves, furniture installations, and office improvements.
- Support facility improvement projects, contractor coordination, and project execution.
- Participate in safety audits, inspections, and continuous improvement initiatives.
Required Qualifications & Skills:
- 3+ years of commercial, industrial, manufacturing, or facilities electrical experience.
- Working knowledge of electrical distribution systems and troubleshooting.
- Ability to read and interpret electrical schematics, construction drawings, and equipment manuals.
- Experience operating power tools and maintenance equipment.
- Ability to lift up to 50 pounds and work on ladders, lifts, and rooftops as needed.
- Valid driver’s license.
Desired Qualifications & Skills:
- Electrician certification or equivalent experience.
- Experience in manufacturing, aerospace, energy, nuclear, semiconductor, or industrial
facilities.
- Experience supporting facility construction projects.
- Knowledge of HVAC systems and building automation systems (BAS).
- Forklift, scissor lift, and boom lift experience.
- Experience with CMMS systems.
- Understanding of OSHA and NFPA 70E electrical safety requirements.
- Experience working in a startup environment.
Success in the First 3 Months:
- Become the primary point of contact for facility electrical issues.
- Reduce dependency on outside electrical contractors for routine work.
- Establish preventative maintenance plans for key facility systems.
- Improve facility response times for maintenance requests.
- Support ongoing facility improvement and capital projects.
- Identify cost-saving opportunities through in-house execution of electrical and maintenance work.
Additional Requirements:
- Must be willing to work extended hours and weekends as necessary to accomplish our mission.
- Must work 100% onsite at El Segundo HQ.
BENEFITS AND PERKS
- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior Manager, Embedded Systems Engineering
Radiant · El Segundo, California, United States
Pay
$208k–284k
Setting
On-site
About Radiant
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
About the Role
Radiant is seeking a Senior Manager of Embedded Engineering to lead the embedded software engineering team through the critical path to commercialization, planning and executing the embedded software architecture for I&C systems with a direct line to Kaleidos' 2028 deployment target. You will build and develop a high-performing team, manage cross-functional stakeholder relationships, and own execution across the full program lifecycle as we move from development into commercial readiness. The ideal candidate is a proven engineering leader who can operate at the intersection of people management, technical strategy, and organizational influence in an ambiguous early-stage environment. You will have the opportunity to shape the embedded software foundation of the first commercialized portable nuclear microreactor, technology that will redefine how the world accesses clean, reliable power.
Responsibilities and Duties
Build, grow, and manage a team of embedded engineers, owning hiring, performance, career development, and team culture.
Partner with embedded technical leads on embedded software architectural decisions, testing frameworks, validation methodology, documentation standards, establishing patterns, and safety requirements.
Manage cross-functional stakeholder relationships with electrical, controls, hardware, and executive leadership, aligning on priorities, interfaces, and constraints.
Own program execution across the embedded engineering lifecycle, setting team expectations, managing delivery milestones, and ensuring accountability from architecture through field implementation.
Required Qualifications and Skills
Bachelor's degree in computer engineering, computer science, electrical engineering, or a related field.
8+ years of industry experience in embedded software, including significant ownership of system-level architecture decisions, real-time operating systems, and low-level programming.
3+ years of engineering management experience, including hiring, performance management, and team development.
Deep proficiency in embedded C/C++.
Track record of translating technical strategy into team execution, setting priorities, removing blockers, and holding the team accountable for rapid delivery.
Strong communicator who can represent the embedded team's work and needs clearly to non-technical and executive audiences.
Desired Qualifications and Skills
Masters degree or higher in computer engineering, computer science, electrical engineering, or a related field.
5+ years of engineering management experience, including hiring, performance management, and team development.
Experience leading teams working with RTOS and bare metal applications.
Experience overseeing Simulink Autocode C++ export and integration in a production context.
Experience managing large, multi-target embedded builds using CMake.
Ability to engage at the hardware/software boundary, proficient in reading schematics and guiding hardware/software debug efforts.
Experience in safety-critical or high-reliability domains (aerospace, defense, medical, nuclear, or industrial).
Additional Requirements
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.
Benefits and Perks
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
One Medical: Sponsored memberships for employees and their dependents.
Vision: 100% top tier plan coverage + 50% for dependents.
Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Listed by Radiant for a position based in the United States. Employers on this board attest they are hiring domestically.
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