Radiant
Staff Nuclear Engineer
$185K–$225K
El Segundo, CA · On-site · Staff · Full-time · Posted Oct 3, 2026
- Experience
- 8+ years of relevant nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations.
- Education
- Bachelor’s degree in nuclear engineering or a related technical discipline from an accredited institution.
- Visa sponsorship
- Any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Provides technical leadership for nuclear design and analysis of Radiant’s Kaleidos microreactor, from engineering requirements and modeling through testing and regulatory documentation.
What you'll do
- Lead nuclear engineering analyses and projects across reactor physics, transport, shielding, safety, thermal-hydraulics, and related workstreams.
- Develop, review, verify, and document analysis models and methods; translate results into reactor design decisions and regulatory materials.
- Coordinate multidisciplinary engineering work, support testing and startup, mentor engineers, and drive technical risks to closure.
What they ask for
- Bachelor’s degree in nuclear engineering or a related technical discipline from an accredited institution.
- 8+ years of relevant nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations.
- Experience owning complex multidisciplinary nuclear engineering projects and developing or applying MCNP, OpenMC, or comparable neutron and radiation transport models.
- Deep knowledge of neutron transport theory, Monte Carlo simulation methods, nuclear data, statistical convergence, and reactor physics.
Nice to have
- Master’s degree or Ph.D. in nuclear engineering or a related technical discipline.
- Experience with advanced reactors or microreactors, nuclear analysis tools such as SCALE or Serpent, Python, multiphysics analysis, or regulatory safety analysis.
Pay
$185K – $225K USD base salary
Tools
MCNP, OpenMC, SCALE, Serpent, Shift, Griffin, MOOSE, Python
Model-written summary · the original posting is authoritative