Radiant
Materials Engineer, Moderator Materials
$106K–$146K
El Segundo, CA · On-site · Full-time · Posted Oct 20, 2026
- Experience
- 2+ years.
- Education
- Bachelor’s degree in Materials Science and Engineering, or in Mechanical, Aeronautical, Nuclear, or Chemical Engineering with a materials science and engineering focus.
- Visa sponsorship
- Any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Develops, tests, and qualifies moderator and reflector materials and manufacturing processes for Radiant’s Kaleidos nuclear microreactor.
What you'll do
- Plan and conduct materials testing and qualification campaigns, including coordinating with external labs and vendors.
- Develop, qualify, and improve manufacturing processes to achieve required material properties.
- Guide materials selection and lead R&D for moderator and reflector components.
What they ask for
- Bachelor’s degree in Materials Science and Engineering, or a listed engineering discipline with a materials science and engineering focus.
- 2+ years of experience developing, testing, and/or analyzing materials for demanding load cases and environments.
- Hands-on experimental or testing experience in laboratory or production environments.
Nice to have
- Master’s or PhD in a listed engineering field with a materials science and engineering focus.
- Experience qualifying nuclear moderator and reflector materials for high-temperature and irradiation environments.
Pay
$106,500 – $146,475 USD base salary
Tools
graphitization, hot isostatic pressing, extrusion, Python
Model-written summary · the original posting is authoritative