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 failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. 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 utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028.
Senior Nuclear Engineer, Manufacturing Facility
Radiant is seeking a highly motivated nuclear engineer to define and execute on nuclear engineering analyses in support of Radiant’s microreactor production facility. You will own criticality safety– and safety analysis–driven design inputs for multiple nuclear working areas, including fresh fuel storage and handling, reactor fueling, reactor testing, and irradiated materials handling and storage. You will interface directly with manufacturing and regulatory engineers to develop submittals and documentation in support of facility licensing.
Responsibilities and Duties:
- Own nuclear engineering design and analysis deliverables in support of facility regulatory submittals
- Responsible engineer for production facility nuclear engineering analyses, including criticality safety, radiation protection, and safety analyses
- Build analysis methods and approaches, execute workflows, and document results to inform regulatory inputs
- Integrate deliverables into the broader regulatory documentation
Required Skills and Qualifications:
- Bachelor’s degree in nuclear engineering or related discipline
- 4–6 years experience in criticality safety, facility safety analysis, fuel manufacturing, or transportation
- Proficiency in documentation of engineering design and analyses
Desired Skills and Qualifications:
- Master’s in nuclear engineering or related discipline
- 6–10 years experience in nuclear analysis in support of a fuel manufacturing facility
- High level of independence in solving challenging engineering tasks is preferred.
- Ability to seek out resources and proactively ask questions to finish projects through completion effectively, accurately, and timely.
- Excited for our mission to rapidly deploy nuclear microreactors to remote locations requiring abundant, clean energy.
- Ability to work in a fast-paced startup environment with a proactive and collaborative attitude.
- 4+ years of experience with nuclear engineering software such as SCALE, MCNP, etc.
- Strong programming skills in any language, preferably Python.
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.
Total Compensation and Benefits
Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview performance, experience, education, and qualifications.
Benefits and Perks for Eligible Employees:
- 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.
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.
Unfortunately, we are unable to provide visa sponsorship at this time.
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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What We Do
Radiant is a clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.
Why Work With Us
Our world-class team has prior experience in complex hardware development from SpaceX, McMaster, The Boring Company, and renowned national laboratories that define our mentality to radically improve our microreactors. We care deeply about our mission to reduce carbon emissions, and have fun while doing so from trivia nights to ski retreats.
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