CertificationEngineer

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 throu