Senior Mechanical Engineer, Nuclear Structures — Onsite

Radiant, based in El Segundo, CA, seeks a Senior Mechanical Engineer to design critical Kaleidos structures, performing stress and thermomechanical analyses to ensure safety and operability in extreme environments.

You will lead trade studies, BOM creation, supplier development, and subassembly management, contributing to the first new commercial reactor design in over 50 years by 2026. This onsite role calls for strong communication and cross-disciplinary collaboration.