Thermal Hydraulics Jobs

Hermeus is hiring Mechanical Engineering interns for Fall 2026 to work on fluids, fuel, and structural hardware for hypersonic aircraft at its Los Angeles facility.

Radiant is hiring a Lead Nuclear Engineer to lead design, analysis, and team execution for the Kaleidos microreactor program across core physics, shielding, I&C, and operations.

Thea Energy is looking for a seasoned Director of Mechanical Engineering to lead mechanical design, analysis, and system integration for its next-generation stellarator fusion hardware.

Navarro Research & Engineering is hiring a Software Developer to build and port scientific HPC applications and user-facing tools for reactor design—candidates must hold a DOE L (or DOD equivalent) clearance and US citizenship.

Lawrence Livermore National Laboratory is hiring Senior Mechanical Engineers to lead complex mechanical design, analysis, and prototype development for national security programs, with opportunities for technical leadership and hybrid work.