Director, Nuclear Engineering — Lead Microreactor Fleet

FELICIS; El Segundo (CA); On-site; USD 200,000 - 260,000; Full time

Benefits offered by this job

Stock plan

Medical coverage (base Silver + depend

One Medical membership

Vision coverage

Dental coverage

FSA/HSA options

Paid parental leave

Daily catered lunch

Flexible PTO

In-person events

El Segundo HQ by the ocean

Job summary

Radiant in El Segundo, CA seeks a Director of Nuclear Engineering to organize design and analysis strategy for its microreactor fleet. Lead core physics, shielding, dose and instrumentation, guiding a team through design margins, peer reviews, and regulatory engagements.

The role requires a strong physics/engineering foundation, 10+ years of leadership in reactor design, and ability to communicate across disciplines. Onsite work only with relocation supported.

Qualifications

• Degree in nuclear engineering, physics, or engineering physics.
• Demonstrated leadership of a reactor design/analysis team (≥10 years).
• Strong grounding in nuclear, thermal, electrical, and mechanical principles.
• Excellent ability to communicate complex concepts to diverse audiences.
• Familiarity with DOE/NRC safety bases and regulatory processes.
• Willingness to relocate to El Segundo, CA.
• Experience with Monte Carlo neutron transport codes.

Responsibilities

• Lead and grow a team of nuclear engineers across multiple domains.
• Drive strategy execution, remove blockers, adapt to priorities.
• Identify and communicate technical, schedule, and regulatory risks.
• Develop analysis roadmaps for fast iteration across reactor programs.
• Collaborate with universities and national labs to achieve objectives.

Skills

Team leadership

Engineering first principles

Technical communication

Nuclear regulatory familiarity

Monte Carlo methods (OpenMC/Serpent/MC

Education

Nuclear engineering / physics / engineering physics degree

Tools

OpenMC

Serpent

MCNP

Job description

Radiant in El Segundo, CA seeks a Director of Nuclear Engineering to organize design and analysis strategy for its microreactor fleet. Lead core physics, shielding, dose and instrumentation, guiding a team through design margins, peer reviews, and regulatory engagements.

The role requires a strong physics/engineering foundation, 10+ years of leadership in reactor design, and ability to communicate across disciplines. Onsite work only with relocation supported.