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
We are seeking a Senior Reactor Systems Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures. Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities.
This position goes beyond traditional systems engineering - you will also gain hands-on experience as a Reactor Operator (RO), directly influencing the development of operational software, procedures, and future reactor designs.
Responsibilities & Duties:
- Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution.
- Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools.
- Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces.
- Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation.
- Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing.
Required Qualifications & Skills:
- 6-7+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing.
- Proficiency in managing or optimizing complex hardware and software processes for testing and operations.
- Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations.
- Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime).
Desired Qualifications & Skills:
- Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations
- 2+ years of full-time nuclear operations experience.
- Licensed as Senior Reactor Operator or Naval equivalent.
- Hands-on experience in developing technical procedures, human factors engineering, or operational interface design.
- Prior operations background such as mission control room operator.
- Proficiency in Python, UNIX, for procedure testing within the simulator environments.
- Experience with human factors and user-centered instructions for operational workflows.
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.
- Willingness to travel 50% - 60% of the time as needed for projects.
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.
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 Certification Engineer to develop, maintain, and govern engineering design standards, requirements, and verification methodologies for the mass production of nuclear reactors. This role bridges systems engineering, design, analysis, manufacturing, and operations. As a Certification Engineer, you will be responsible for ensuring that hardware and concepts of operation meet requirements and are designed in accordance with Radiant standards. In short, you’ll be the glue between our analysis, test, certification, and design teams, helping to connect the technical dots and solve problems across our reactor designs.
Responsibilities:
- Develop, own, and continuously improve design criteria, standards, and requirements for reactor core, structures, fluid systems, electronics, and shielding.
- Provide critical peer review and approval of hardware designs during design reviews; confirm acceptance and qualification test campaigns.
- Engage with Engineering to drive optimized designs while shepherding them through the design review process, verification testing, and part release.
- Guide engineers through the Radiant design process and ensure design criteria/requirements are being followed for reactor design, manufacturing, and test activities.
- Collaborate with responsible engineers throughout the entire design process, ensuring design criteria are properly considered in the development of hardware.
Required Skills and Qualifications:
- Undergraduate degree in engineering.
- 2+ years of full-time experience with engineering problem solving in design, analysis, or test of systems.
- Experience with complex hardware and processes related to manufacturing, integration, testing or operations.
- Applied understanding of requirement derivation, negotiation and verification or experience with the product design process especially as it relates to defining systems, interfaces and specifications.
Desired Skills and Qualifications:
- Advanced degree in an engineering discipline.
- Experience with requirements management tools (e.g., DOORS, Jama, Flow).
- Strong understanding of the system design process including interface control and tradeoffs.
- Familiarity with structural, thermal, and fluid systems.
- 5+ years professional experience in an engineering role (design, analysis, test, or manufacturing.
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.
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
We are seeking a Reactor Operations Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures. Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities.
This position goes beyond traditional systems engineering - you will also gain hands-on experience as a Reactor Operator (RO), directly influencing the development of operational software, procedures, and future reactor designs.
Responsibilities & Duties:
- Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution.
- Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools.
- Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces.
- Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation.
- Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing.
Required Qualifications & Skills:
- 4+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing.
- Proficiency in managing or optimizing complex hardware and software processes for testing and operations.
- Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations.
- Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime).
Desired Qualifications & Skills:
- Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations
- 2+ years of full-time nuclear operations experience.
- Licensed as Senior Reactor Operator or Naval equivalent.
- Hands-on experience in developing technical procedures, human factors engineering, or operational interface design.
- Prior operations background such as mission control room operator.
- Proficiency in Python, UNIX, for procedure testing within the simulator environments.
- Experience with human factors and user-centered instructions for operational workflows.
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.
- Willingness to travel 50% - 60% of the time as needed for projects.
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.
Engineering
92 days ago
Build Engineer, Turbomachinery - 2026 New Graduate
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 YOUR ROLE
We are seeking for a Build Engineer to help bring high-speed rotating hardware from design into reality. This is a hands-on role ideal for new graduates or early-career engineers who want to learn by building, assembling, and integrating complex turbomachinery systems. You will work closely with design, test, and manufacturing teams, helping prepare hardware for first-article testing and system validation.
This is a fantastic opportunity to gain real-world experience with high-speed, high-temperature rotating machinery while making a direct impact on a first-of-its-kind nuclear microreactor program.
Responsibilities & Duties:
HANDS-ON BUILDS & ASSEMBLY
- Responsible for assembly and integration of prototype and first-article turbomachinery. hardware, including compressors, turbines, rotors, electric motors, bearings, seals, and housings.
- Develop precise assembly instructions, alignment procedures, and torque specifications.
- Support rotor stacking, bearing installation, balancing, and alignment operations.
- Document assembly activities, as-built observations, and lessons learned.
PROCESS & TOOLING SUPPORT
- Help develop and maintain build tools, fixtures, and work-holding solutions.
- Support creation of work instructions and standard operating procedures for assembly processes.
- Provide feedback to design and manufacturing teams to improve hardware assembly and integration.
CROSS-FUNCTIONAL COLLABORATION
- Work closely with design engineers, test engineers, and technicians to prepare hardware for testing and validation.
- Participate in troubleshooting assembly issues and contribute to iterative improvements.
- Receive mentorship from senior build engineers while gradually taking on more responsibility.
LEARNING & GROWTH
- Gain experience with high-speed rotating machinery, tight tolerances, and precision assembly.
- Learn industry best practices for turbomachinery build, integration, and first-article readiness.
- Develop problem-solving skills and hands-on engineering judgment in a fast-paced startup environment.
Required Qualification & Skills:
- Bachelor’s degree in Mechanical Engineering or a related field
- Strong interest in hands-on mechanical assembly, rotating machinery, or turbomachinery systems.
- Basic understanding of GD&T, fits, torque, and alignment principles.
- Comfort reading and interpreting mechanical drawings and CAD models.
- Willingness to learn, take initiative, and work safely with precision hardware.
Desired Qualifications & Skills:
- Prior hands-on experience from internships, co-ops, class projects, or design competitions (SAE, Formula SAE, robotics, etc.).
- Familiarity with mechanical assembly, rotor balancing, or bearing handling.
- Interest in turbomachinery, power generation, or high-speed rotating systems.
- Excited to work in a fast-paced, innovative startup environment.
- Prior nuclear experience is not required.
Additional Requirements:
- Must be willing to work extended hours and occasional weekends to support build schedules.
- Must work 100% onsite at Radiant’s El Segundo headquarters.
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.
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.
Senior Technical Recruiter
Radiant is seeking a bold, driven, and hands-on Senior Technical Recruiter to build and scale a world-class team in a high-growth, startup environment. You will own the full-cycle recruitment process—from intake and sourcing strategy to closing top-tier candidates—while serving as a trusted partner to hiring managers and a champion of Radiant’s mission to deliver the world’s first portable zero-carbon nuclear microreactor.
The ideal candidate thrives in fast-paced, high-ambiguity environments, excels at securing the top 5% of talent across disciplines, and takes extreme ownership over outcomes. You will recruit for a diverse range of technical and corporate roles, from entry-level to senior leadership. This role offers the opportunity to directly shape the team that will redefine the future of clean, reliable energy.
Responsibilities and Duties:
Own and manage the full-cycle recruiting process, delivering an exceptional candidate experience from first contact to signed offer.
Partner closely with hiring managers and senior leadership to define hiring strategies, establish best practices, and close high-caliber talent.
Develop and uphold consistent, structured hiring processes that assess and attract mission-aligned candidates.
Drive creative and proactive sourcing strategies, including targeted campaigns, industry networking, and non-traditional recruiting channels.
Represent Radiant at recruiting, networking, and industry events to build talent pipelines and strengthen employer brand.
Identify and implement process improvements in the recruitment function, leveraging data and metrics to inform decisions.
Required Qualifications and Skills:
Bachelor’s degree from an accredited university or 5+ years of professional experience as a technical recruiter.
5+ years of full-cycle technical recruiting experience, preferably in-house.
Demonstrated success sourcing and closing niche, passive talent across varied disciplines.
Strong communication skills and confidence engaging with senior leadership and hiring managers.
Proven ability to recruit across a wide range of skill sets, from early-career to senior technical and corporate roles.
Desired Qualifications and Skills:
Background in hardware recruiting, specifically electrical, mechanical, technicians, etc.
Experience building diverse and inclusive teams.
Expertise in both traditional and non-traditional recruiting methods, including cold outreach, networking, and targeted sourcing campaigns.
Ability to work autonomously, adapt to shifting priorities, and develop deep role-specific expertise.
Passion for Radiant’s mission, paired with curiosity, resourcefulness, and drive.
Additional Requirements:
Must be willing to work extended hours and weekends as necessary to meet company goals.
Must work 100% onsite at Radiant’s El Segundo HQ.
Occasional travel for recruitment and networking events.
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.
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.
Senior Technical Recruiter
Radiant is seeking a bold, driven, and hands-on Senior Technical Recruiter to build and scale a world-class team in a high-growth, startup environment. You will own the full-cycle recruitment process—from intake and sourcing strategy to closing top-tier candidates—while serving as a trusted partner to hiring managers and a champion of Radiant’s mission to deliver the world’s first portable zero-carbon nuclear microreactor.
The ideal candidate thrives in fast-paced, high-ambiguity environments, excels at securing the top 5% of talent across disciplines, and takes extreme ownership over outcomes. You will recruit for a diverse range of technical and corporate roles, from entry-level to senior leadership. This role offers the opportunity to directly shape the team that will redefine the future of clean, reliable energy.
Responsibilities and Duties:
- Own and manage the full-cycle recruiting process, delivering an exceptional candidate experience from first contact to signed offer.
- Partner closely with hiring managers and senior leadership to define hiring strategies, establish best practices, and close high-caliber talent.
- Develop and uphold consistent, structured hiring processes that assess and attract mission-aligned candidates.
- Drive creative and proactive sourcing strategies, including targeted campaigns, industry networking, and non-traditional recruiting channels.
- Represent Radiant at recruiting, networking, and industry events to build talent pipelines and strengthen employer brand.
- Identify and implement process improvements in the recruitment function, leveraging data and metrics to inform decisions.
Required Qualifications and Skills:
- Bachelor’s degree from an accredited university or 5+ years of professional experience as a technical recruiter.
- 5+ years of full-cycle technical recruiting experience, preferably in-house.
- Demonstrated success sourcing and closing niche, passive talent across varied disciplines.
- Strong communication skills and confidence engaging with senior leadership and hiring managers.
- Proven ability to recruit across a wide range of skill sets, from early-career to senior technical and corporate roles.
Desired Qualifications and Skills:
- Background in hardware recruiting, specifically electrical, mechanical, technicians, etc.
- Experience building diverse and inclusive teams.
- Expertise in both traditional and non-traditional recruiting methods, including cold outreach, networking, and targeted sourcing campaigns.
- Ability to work autonomously, adapt to shifting priorities, and develop deep role-specific expertise.
- Passion for Radiant’s mission, paired with curiosity, resourcefulness, and drive.
Additional Requirements:
- Must be willing to work extended hours and weekends as necessary to meet company goals.
- Must work 100% onsite at Radiant’s El Segundo HQ.
- Occasional travel for recruitment and networking events.
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.
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 Electrical Engineer to lead the design, build, and maintenance of Radiant's electrical test infrastructure for Kaleidos, Radiant's commercial microreactor unit targeted for deployment in 2028. You will take ownership of test infrastructure development, including HIL systems and other electrical test platforms, while driving integration and validation across critical systems. This role is ideal for an experienced electrical engineer with deep hands-on expertise in test infrastructure who is ready to own technical decisions across electrical integration, validation strategy, and test environment development. You will have the opportunity to shape the electrical test infrastructure supporting the first high-temperature gas-cooled portable microreactor ever to be commercialized.
Responsibilities and Duties:
Own the design, build, and maintenance of electrical test infrastructure, including test benches and other test platforms as the program evolves.
Define electrical and software integration requirements spanning power distribution, signal conditioning, sensor mapping, actuator interfaces, and device simulation.
Own communication and integration between hardware, control systems, and software interfaces.
Lead the electrical validation strategy; develop, execute, and iterate on test procedures and methodologies.
Assemble, debug, and troubleshoot electrical test hardware and harnesses with minimal guidance.
Execute test procedures, collect data, and lead analysis across multiple test environments.
Drive optimization of test and validation processes and lead improvements in tooling and automation.
Lead design reviews and communicate technical decisions to cross-functional stakeholders.
Required Skills and Qualifications:
BS in Electrical Engineering or a related field.
5+ years of hands-on experience in electrical engineering, including hardware design, integration, and test.
Demonstrated experience owning and building electrical test infrastructure.
Proficiency with DAQ and test platforms such as dSpace, NI PXI, Speedgoat, or similar.
Hands-on experience with data acquisition, test execution, and validation frameworks.
Strong electrical and software debugging and troubleshooting skills.
Desired Skills and Qualifications:
Experience with real-time simulation systems and FPGA-based hardware.
Strong understanding of control fundamentals and software testing processes.
Experience with trace capture tools or data acquisition and analysis tools.
Background in high-reliability, safety-critical, or regulated industry environments (aerospace, defense, nuclear, medical, or automotive).
Comfortable owning multiple test environments and defining new test infrastructure as program needs evolve.
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.
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 Electrical Engineer to lead the design, build, and maintenance of Radiant's electrical test infrastructure for Kaleidos, Radiant's commercial microreactor unit targeted for deployment in 2028. You will take ownership of test infrastructure development, including HIL systems and other electrical test platforms, while driving integration and validation across critical systems. This role is ideal for an experienced electrical engineer with deep hands-on expertise in test infrastructure who is ready to own technical decisions across electrical integration, validation strategy, and test environment development. You will have the opportunity to shape the electrical test infrastructure supporting the first high-temperature gas-cooled portable microreactor ever to be commercialized.
RESPONSIBILITIES AND DUTIES:
- Own the design, build, and maintenance of electrical test infrastructure, including test benches and other test platforms as the program evolves.
- Define electrical and software integration requirements spanning power distribution, signal conditioning, sensor mapping, actuator interfaces, and device simulation.
- Own communication and integration between hardware, control systems, and software interfaces.
- Lead the electrical validation strategy; develop, execute, and iterate on test procedures and methodologies.
- Assemble, debug, and troubleshoot electrical test hardware and harnesses with minimal guidance.
- Execute test procedures, collect data, and lead analysis across multiple test environments.
- Drive optimization of test and validation processes and lead improvements in tooling and automation.
- Lead design reviews and communicate technical decisions to cross-functional stakeholders.
REQUIRED SKILLS AND QUALIFICATIONS:
- BS in Electrical Engineering or a related field.
- 5+ years of hands-on experience in electrical engineering, including hardware design, integration, and test.
- Demonstrated experience owning and building electrical test infrastructure.
- Proficiency with DAQ and test platforms such as dSpace, NI PXI, Speedgoat, or similar.
- Hands-on experience with data acquisition, test execution, and validation frameworks.
- Strong electrical and software debugging and troubleshooting skills.
DESIRED SKILLS AND QUALIFICATIONS:
- Experience with real-time simulation systems and FPGA-based hardware.
- Strong understanding of control fundamentals and software testing processes.
- Experience with trace capture tools or data acquisition and analysis tools.
- Background in high-reliability, safety-critical, or regulated industry environments (aerospace, defense, nuclear, medical, or automotive).
- Comfortable owning multiple test environments and defining new test infrastructure as program needs evolve.
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.
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
We are seeking a Senior Test Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures. Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities.
This position goes beyond traditional systems engineering - you will also gain hands-on experience as a Reactor Operator (RO), directly influencing the development of operational software, procedures, and future reactor designs.
Responsibilities & Duties:
Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution.
Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools.
Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces.
Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation.
Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing.
Required Qualifications & Skills:
6-7+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing.
Proficiency in managing or optimizing complex hardware and software processes for testing and operations.
Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations.
Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime).
Desired Qualifications & Skills:
Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations
2+ years of full-time nuclear operations experience.
Licensed as Senior Reactor Operator or Naval equivalent.
Hands-on experience in developing technical procedures, human factors engineering, or operational interface design.
Prior operations background such as mission control room operator.
Proficiency in Python, UNIX, for procedure testing within the simulator environments.
Experience with human factors and user-centered instructions for operational workflows.
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.
Willingness to travel 50% - 60% of the time as needed for projects.
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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