Radiant
Principal Nuclear Engineer
$196K–$262K
El Segundo, CA · On-site · Principal · Full-time · Posted Sep 11, 2026
- Experience
- 12+ years of relevant nuclear engineering experience.
- Education
- Bachelor’s degree in nuclear engineering or a related technical discipline; a Master’s degree or Ph.D. is preferred.
- Visa sponsorship
- Any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Leads interdisciplinary nuclear engineering for the Kaleidos microreactor, from design analysis and verification through testing and regulatory documentation.
What you'll do
- Lead nuclear engineering teams and set technical priorities, plans, and ownership.
- Direct neutron and radiation transport analyses and translate results into reactor design and operational decisions.
- Guide verification, testing, safety and regulatory analysis, and technical documentation.
What they ask for
- Bachelor’s degree in nuclear engineering or a related technical discipline.
- 12+ years of relevant nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations.
- Demonstrated experience leading complex nuclear engineering projects and multidisciplinary teams, including hiring, managing, mentoring, or technical leadership.
- Deep neutron transport and Monte Carlo expertise, including professional experience with MCNP, OpenMC, or comparable tools.
Nice to have
- Master’s degree or Ph.D. in nuclear engineering or a related discipline.
- Experience with advanced reactors or microreactors, analysis tools, simulation programming, multiphysics, regulatory work, or reactor testing.
Pay
$195,713 – $262,500 (base salary)
Tools
MCNP, OpenMC, SCALE, Serpent, Shift, Griffin, MOOSE, Python
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