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Radiant is building the world's first mass-produced, portable nuclear microreactors. The company's flagship product, Kaleidos, is a 1-megawatt, fail-safe microreactor designed for rapid deployment to hospitals, data centers, remote sites, and military bases. Founded in 2020, Radiant is preparing for testing at Idaho National Laboratory and initial customer deliveries in 2028.
As Senior Structural Engineer, you will own the design and development of critical structures within Kaleidos, including mass-efficient transportable shielding systems, container systems, and high-temperature graphite and metallic components. You will tackle unique engineering challenges in extreme temperature environments while meeting strict volumetric constraints.
Key responsibilities include: conducting trade studies and developing designs to meet program requirements; performing detailed thermomechanical analysis (static strength, durability, fatigue) and dynamic analysis (vibration, shock) using hand calculations and finite element tools (Abaqus, Ansys, FEMAP); developing manufacturing and assembly instructions and test plans; creating and managing bills of materials; identifying and developing suppliers; owning subassembly design, manufacturing, and test schedules; conducting FMEA risk analysis for subsystems; and collaborating with cross-functional teams.
Required: Bachelor's degree in Mechanical, Aeronautical, Civil, or Structural Engineering; 6+ years designing structures; 4+ years performing stress analysis using both hand calculations and FEA tools.
Desired: CAD experience (NX or similar); experience with multi-component assemblies that were manufactured and deployed; thermal expansion design expertise; GD&T proficiency; ability to work with interdisciplinary teams; text-based software development tool experience.
The role requires 100% onsite work at El Segundo headquarters and willingness to work extended hours and weekends as needed. Radiant offers substantial equity, comprehensive health benefits, 8 weeks paid parental leave, catered lunch, flexible PTO, and team events.
