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Lead Nuclear Engineer

Job in El Segundo, Los Angeles County, California, 90245, USA
Listing for: Radiant Industries
Full Time position
Listed on 2026-11-04
Job specializations:
  • Engineering
    Systems Engineer, Electrical Engineering
Salary/Wage Range or Industry Benchmark: 180000 - 280000 USD Yearly USD 180000.00 280000.00 YEAR
Job Description & How to Apply Below

Lead Nuclear Engineer

Radiant is seeking a technical and people-oriented leader for our nuclear design and analysis group focused in areas such as core physics, shielding, instrumentation & controls, and reactor operations. You will lead a high-performing team through the design, development, and test stages of the Kaleidos microreactor. You will own the schedule, budget, hiring, and execution of nuclear-related milestones with a key focus on safety, reliability, portability, and performance.

The ideal candidate is comfortable in interdisciplinary environments working cross-functionally with engineers and leadership, is fluent in engineering first principles, has tenacious creative problem-solving abilities and keen to get to the solution of a problem, and loves to mentor and motivate engineers to deliver their best work. You will play a critical role in driving the first portable nuclear microreactor to market.

Responsibilities and Duties:

  • Manage an interdisciplinary team of nuclear engineers focused in areas such as safety analyses, core performance, shielding – including operational dose, activation, shutdown dose – I&C, operations, thermal-hydraulics and more.
  • Hire, lead, and grow a high performing team of nuclear engineers.
  • Own nuclear engineering projects end to end including requirement capture, multi-disciplinary design iteration, simulation pipeline development, analysis post-processing, and summarization for regulatory deliverables.
  • Collaborate with regulatory team on nuclear industry standards and requirements.
  • Mentor engineers through actionable feedback and coaching.

Required

Qualifications and Skills:

  • Bachelor’s degree in nuclear engineering or equivalent degree from accredited institution.
  • 5+ years nuclear engineering industry experience with relevant software use, including MCNP and/or OpenMC.
  • Deep knowledge of neutron transport and Monte Carlo simulation theory.
  • 1+ year managing direct reports.

Desired

Qualifications and Skills:

  • Master’s or PhD in nuclear engineering or equivalent degree from accredited institution.
  • Subject matter expert in one of following areas: safety analysis, shielding, instrumentation and controls, reactor operations, and/or radioactive material transportation.
  • Hands-on experience designing hardware and/or performing tests.
  • Experience with High-Performance Computing.
  • High-level understanding of government regulatory requirements and engineering practices required to build a safe, reliable reactor.
  • Self-starter and autonomous in planning, scheduling, and leading teams to execute on milestones on time.
  • Experienced leading teams in fast-paced environments, complex technical environment.
  • Expert communicator up and down the chain and effectively acts as a technical advisor.
  • Ability to make sound judgement calls based on company priorities and resources.
  • Tenacious in finding creative solutions to complex problems.
Benefits and Perks
  • Stock:
    Substantial incentive stock plan for all full-time employees.
  • Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
  • One Medical:
    Sponsored memberships for employees and their dependents.
  • Vision: 100% top tier plan coverage + 50% for dependents.
  • Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
  • Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
  • 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
  • Daily catered lunch. Free snacks and drinks.
  • Flexible PTO policy. Remote workday allocation.
  • Company and team-bonding events, happy hours and in-person camaraderie.
  • Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation and Benefits

Radiant…

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