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Senior Nuclear Engineer Jobs (NOW HIRING)

Cantos Ventures

Senior Nuclear Engineer

El Segundo, CA · On-site

$133.50 - $207.90/hr

Location El Segundo HQ Employment Type Full time Location Type On-site Department Engineering Nuclear Engineering Compensation * $133.5K - $207.9K • Offers Equity Senior Nuclear Engineer Radiant is ...

Last Energy

Senior Nuclear Engineer

Austin, TX · On-site

$103K - $142K/yr

We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical rigor behind our microreactor design. This role will act as both a technical leader and independent ...

Last Energy

Senior Nuclear Engineer

Austin, TX · On-site

$103K - $142K/yr

We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical rigor behind our microreactor design. This role will act as both a technical leader and independent ...

Last Energy

Senior Nuclear Engineer

Austin, TX · On-site

$103K - $142K/yr

We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical rigor behind our microreactor design. This role will act as both a technical leader and independent ...

Radiant

Senior Nuclear Engineer

El Segundo, CA · On-site

$133K - $184K/yr

About the Role Radiant is seeking a driven Senior Nuclear Engineer to join our team! You will own modeling methods and reactor physics calculations of neutronics parameters such as reactivity ...

Radiant Industries

Senior Nuclear Engineer

El Segundo, CA · On-site

$111K - $152K/yr

About the Role Radiant is seeking a driven Senior Nuclear Engineer to join our team! You will own modeling methods and reactor physics calculations of neutronics parameters such as reactivity ...

Parsons Corporation

Nuclear Engineer

$63K - $111K/yr

NUCLEAR ENGINEER When it comes to what you want in your career, if you can imagine it, you can do ... Under the guidance of a senior engineer, supports development of documents pertaining to:

Parsons

Nuclear Engineer

$63K - $111K/yr

NUCLEAR ENGINEER When it comes to what you want in your career, if you can imagine it, you can do ... Under the guidance of a senior engineer, supports development of documents pertaining to:

Antares

Senior Nuclear Engineer

Los Angeles, CA · On-site

$150K - $185K/yr

About the Role As a member of the nuclear engineering team, you will become the responsible engineer for a key component of the Antares reactor design such as reactivity controls and instrumentation ...

Industrious Ventures

$140 - $220/hr

About the Role As a member of the nuclear engineering team, you will become the responsible engineer for a key component of the Antares reactor design such as reactivity controls and instrumentation ...

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Senior Nuclear Engineer information

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$59.5K

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How much do senior nuclear engineer jobs pay per year?

As of Aug 28, 2026, the average yearly pay for senior nuclear engineer in the United States is $126,557.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,500.00 and $143,500.00 per year, depending on experience, location, and employer.

What is a senior nuclear engineer?

Senior Nuclear Engineers are experienced professionals who design, develop, operate, and oversee nuclear power plants and related systems. They are responsible for ensuring the safety, efficiency, and regulatory compliance of nuclear operations, as well as troubleshooting complex technical issues. Senior Nuclear Engineers often lead teams, manage projects, and contribute to research and development in the nuclear energy field. Their expertise is critical in maintaining safe energy production and advancing nuclear technology.

What are the key skills and qualifications needed to thrive as a senior nuclear engineer?

To thrive as a Senior Nuclear Engineer, you need an advanced degree in nuclear engineering or a related field, strong analytical skills, and several years of industry experience. Familiarity with nuclear simulation software, regulatory compliance systems, and certifications such as Professional Engineer (PE) licensure are typically required. Excellent leadership, problem-solving, and communication skills help you manage complex projects and collaborate with multidisciplinary teams. These competencies ensure the safe, efficient, and regulatory-compliant operation of nuclear facilities while advancing project objectives.

What are some typical challenges senior nuclear engineers face in project management and how can they be addressed?

Senior Nuclear Engineers often encounter challenges such as coordinating multidisciplinary teams, ensuring regulatory compliance, and managing complex technical risks during large-scale projects. Effective communication and strong leadership skills are key to overcoming these obstacles, as is keeping up-to-date with evolving safety standards. Proactively engaging with stakeholders and implementing rigorous project management methodologies help ensure that projects stay on track and meet safety and quality requirements.

What is the difference between Senior Nuclear Engineer vs Nuclear Safety Engineer?

AspectSenior Nuclear EngineerNuclear Safety Engineer
Required CredentialsBachelor's or Master's in Nuclear Engineering, PE license often preferredBachelor's or Master's in Nuclear Engineering, specialized training in safety protocols
Work EnvironmentDesign, develop, and oversee nuclear systems; collaborate with engineers and project teamsAssess safety risks, develop safety procedures, ensure compliance with safety standards
Employer & Industry UsagePower plants, nuclear research, defense contractorsRegulatory agencies, nuclear power plants, consulting firms

While both roles require nuclear engineering expertise, Senior Nuclear Engineers focus on system design and project management, whereas Nuclear Safety Engineers specialize in safety assessments and compliance. Both positions are vital in ensuring safe and efficient nuclear operations.

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Senior Nuclear Engineer jobs near you
Infographic showing various Senior Nuclear Engineer job openings in the United States as of August 2026, with employment types broken down into 94% Full Time, 2% Part Time, and 4% Contract. Highlights an 85% Physical, 6% Hybrid, and 9% Remote job distribution, with an average salary of $126,557 per year, or $60.8 per hour.

Senior Nuclear Engineer

El Segundo, CA • On-site

Cantos Ventures
See more jobs at Cantos Venturesexternal

$133.50 - $207.90/hr

Other

Medical, Dental, Vision, Life, PTO

Posted 10 days ago

Job description

Location

El Segundo HQ

Employment Type

Full time

Location Type

On-site

Department

Engineering Nuclear Engineering

Compensation
  • $133.5K – $207.9K • Offers Equity
Senior Nuclear Engineer

Radiant is seeking a driven Senior Nuclear Engineer to join our team! You will own modeling methods and reactor physics calculations of neutronics parameters such as reactivity, kinetics parameters, and energy deposition distributions used within our cutting‑made Digital Twin simulation software. You’ll be responsible for assessing conservatism and verifying assumptions within the modeling methods and documenting all results. Because these methods are pivotal in the safety analysis, you will play a key role in the commercialization of the first mass‑produced nuclear reactor.

Responsibilities and Duties
  • Own modeling methods of core neutronics and reactor physics calculations supporting Radiant’s transient safety analyses.
  • Perform calculations of energy deposition distributions, reactivity coefficients, kinetics parameters, and control blade worths to input into Digital Twin models.
  • Verify assumptions and assess conservatism of neutronics models.
  • Document methods for both technical and non-technical audiences.
  • Assist in Verification & Validation (V&V) efforts for the Digital Twin.
  • Review and support other nuclear analyses across the company in reactor physics, shielding, and radiation detection.
Required Skills and Qualifications
  • Bachelor’s degree in nuclear engineering or a similar field from an accredited institution.
  • 4+ years of experience with Monte Carlo nuclear engineering software such as OpenMC, MCNP, Serpent, SCALE, etc.
  • Experience documenting analysis methods and assumptions.
  • Strong programming skills in any language, preferably Python.
Desired Skills and Qualifications
  • Knowledge and experience in reactor kinetics.
  • Basic knowledge of thermal hydraulic principles.
  • Experience communicating and distilling information with cross‑functional teams.
  • Driven, self‑motivated, and takes ownership of work end to end.
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.

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.

Compensation Range: $133.5K - $207.9K

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