Lead Nuclear Materials Engineer

**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\. **Lead Nuclear Materials Engineer** Radiant is seeking a highly motivated **Lead Nuclear Materials Engineer** to lead Radiant’s nuclear materials team in the development, testing, and qualification of materials and related manufacturing processes used in the Kaleidos 1MWe nuclear microreactor. The ideal candidate is excited to grow an in\-house nuclear materials team, is proficient in materials selection, testing, and analysis, takes great ownership of their work end\-to\-end, and thrives in a highly cross\-functional, fast\-paced environment. Your team’s ownership spans fuel, moderators, shielding, neutron poisons, and irradiation testing. You will be a key contributor to building the world's first mass\-produced, rapidly\-deployable nuclear reactor. **Responsibilities \& Duties** * Set the technical direction for the nuclear materials team, including the definition of project scopes, the guidance of day\-to\-day engineering and support activities, and the development of a nuclear materials roadmap to support future reactor designs and builds * Deliver materials solutions for fuel, moderator, shielding, and neutron poison designs for Kaleidos * Accountable for nuclear materials engineering team’s technical output * Lead and mentor team members technically and professionally * Communicate project status, issues, and schedules to teammates and executives * Present to external stakeholders and regulatory bodies (DOE, NRC) * Review test plans, purchase orders, and analysis * Provide surge materials engineering support as\-needed * Manage irradiation testing from design of experiment through irradiation to post irradiation examination (PIE) **Required Qualifications \& Skills** * Bachelor’s degree from an accredited institution in Materials Science and Engineering, or in Mechanical, Aeronautical, Nuclear, or Chemical Engineering with a materials science and engineering focus. * 5\+ years of experience working in the development, testing, and/or analysis of nuclear materials for demanding load cases and environments * Hands\-on experimental or testing experience