Senior Reactor Engineer

Radiant is seeking a Senior Reactor Engineer to lead the testing and verification of critical components, mechanisms, and subsystems within the Kaleidos microreactor. The ideal candidate brings strong engineering fundamentals, practical testing experience, and sound technical judgment.

What You Will Do

Lead testing and verification of reactor components, mechanisms, and subsystems, including core assemblies, reactivity control mechanisms, instrumentation, and associated hardware. Develop test plans, procedures, instrumentation requirements, and acceptance criteria to verify hardware performance against design and safety requirements.

Why It Might Be a Fit

The ideal candidate should be comfortable developing and reviewing test procedures, evaluating hardware performance, collaborating with reactor operations, and driving complex engineering problems through resolution.

Requirements

• Bachelor's degree in nuclear engineering, mechanical engineering, or a related technical discipline from an accredited institution.
• 5+ years of relevant experience in reactor engineering, hardware testing, design verification, or complex hardware development.
• Demonstrated experience developing and executing component or subsystem tests, including planning, instrumentation, data analysis, and performance evaluation.
• Strong engineering fundamentals in mechanical systems, heat transfer, materials, instrumentation, and component performance.
• Understanding of reactor operating principles, safety functions, and component-level performance requirements.
• Experience developing technical procedures, establishing acceptance criteria, and evaluating results against engineering requirements.
• Experience troubleshooting hardware failures, conducting root cause investigations, and implementing design improvements.
• Ability to interpret engineering drawings, specifications, and technical requirements while independently owning multidisciplinary engineering projects.

Benefits

• 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.
• 8-weeks of paid parental leave for all parents.
• 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.