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Radiant Nuclear Jobs (NOW HIRING)

Radiant

Lead Nuclear Engineer

El Segundo, CA · On-site

$140.50K - $237.30K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant

Nuclear Engineer

El Segundo, CA · On-site

$106.50K - $146.48K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant

Nuclear Engineer, Core Physics

El Segundo, CA · On-site

$106.50K - $146.48K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant Industries

Lead Nuclear Engineer

El Segundo, CA · On-site

$140.50K - $237.30K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant Industries

Nuclear Engineer

El Segundo, CA · On-site

$106.50K - $146.48K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant

Senior Nuclear Engineer

El Segundo, CA · On-site

$133.50K - $184.80K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant Industries

Senior Nuclear Engineer

El Segundo, CA · On-site

$133.50K - $184.80K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant

Senior Motor Design Engineer

El Segundo, CA · On-site

$158K - $247.28K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Engineering Manager, Electronics

El Segundo, CA · On-site

$208.50K - $284.03K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Senior Electrical Engineer

El Segundo, CA · On-site

$158K - $219.45K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Senior Embedded Engineer - DSP

El Segundo, CA · On-site

$158K - $219.45K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Systems Engineer

El Segundo, CA · On-site

$133.50K - $190.05K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Senior Thermal Analyst

El Segundo, CA · On-site

$139.50K - $224.70K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Senior Thermal-Hydraulics Engineer

El Segundo, CA · On-site

$139.50K - $224.70K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Senior People Business Partner

El Segundo, CA · On-site

$115K - $168K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Senior Thermal Modeling Engineer

El Segundo, CA · On-site

$139.50K - $224.70K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant

Thermal Modeling Engineer

El Segundo, CA · On-site

$107.50K - $150K/yr

Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

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How much do radiant nuclear jobs pay per hour?

As of Jun 1, 2026, the average hourly pay for radiant nuclear in the United States is $51.91, according to ZipRecruiter salary data. Most workers in this role earn between $39.18 and $62.50 per hour, depending on experience, location, and employer.

What is a Radiant Nuclear job?

A Radiant Nuclear job typically involves working with advanced nuclear technologies, focusing on safe and efficient energy production. Roles may include reactor operation, radiation safety, regulatory compliance, and research into next-generation nuclear reactors. Professionals in this field often have backgrounds in nuclear engineering, physics, or related disciplines. The job may also involve maintaining and optimizing nuclear systems for sustainable energy solutions.

What are the key skills and qualifications needed to thrive in the Radiant Nuclear position, and why are they important?

To excel as a Radiant Nuclear Engineer, you typically need a strong background in nuclear engineering, radiation physics, and safety protocols, usually supported by a relevant engineering degree and certification. Familiarity with specialized nuclear instrumentation, radiation detection equipment, and regulatory compliance systems is essential. Excellent problem-solving abilities, attention to detail, and effective teamwork are valuable soft skills in this role. These capabilities ensure safe operations, regulatory compliance, and successful collaboration in high-stakes nuclear environments.

What are the typical work environments for Radiant Nuclear professionals, and how do they collaborate with other teams?

Radiant Nuclear professionals often work in power plants, research labs, or industrial facilities where they ensure the safe and efficient use of nuclear technologies. Their responsibilities usually involve close collaboration with engineers, health physicists, safety inspectors, and operations staff to maintain safety standards and respond to technical challenges. They may participate in multi-disciplinary project teams, routinely attend safety briefings, and work with regulatory agencies to ensure compliance. These team interactions foster a culture of safety and innovation, making communication skills and teamwork vital for success in the role.
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Radiant Nuclear jobs near you
Infographic showing various Radiant Nuclear job openings in the United States as of May 2026, with employment types broken down into 5% Locum Tenens, 30% Full Time, 5% Part Time, 2% Temporary, 56% Contract, and 2% Nights. Highlights an 56% Physical, and 44% Remote job distribution, with an average salary of $107,964 per year, or $51.9 per hour.
Lead Nuclear Engineer

Lead Nuclear Engineer

Radiant

El Segundo, CA • On-site

$140.50K - $237.30K/yr

Full-time

Medical, Dental, Vision, Life, PTO

Posted 3 days ago

Job description

About Radiant
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
About the Role
Radiant is seeking a technical and people-oriented Lead Nuclear Engineer 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 & 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 & 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 & 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.

Additional Requirements:
  • Must be willing to work extended hours and weekends as necessary to accomplish our mission.
  • Must work 100% onsite at El Segundo HQ.
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 compensates people for impact and invests in those who continue to raise the bar. Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today's advanced reactor builders don't wait for job postings. They join the winning team. If that's you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
Unfortunately, we are unable to provide visa sponsorship at this time.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant's capacity to serve in compliance with U.S. export controls.

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