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Entry Level Nuclear Criticality Safety Engineer Jobs

LLNL

Criticality Safety Engineer

Livermore, CA · On-site

$146K - $222K/yr

This position is in the Nuclear Criticality Safety Division within the Environment, Safety, and ... Bachelor's Degree in Nuclear Engineering, Physics, or closely related scientific discipline or the ...

LLNL

Criticality Safety Engineer

Livermore, CA

$146K - $222K/yr

This position is in the Nuclear Criticality Safety Division within the Environment, Safety, and ... Bachelor's Degree in Nuclear Engineering, Physics, or closely related scientific discipline or the ...

LLNL

Criticality Safety Engineer

Livermore, CA · On-site

$146K - $222K/yr

This position is in the Nuclear Criticality Safety Division within the Environment, Safety, and ... Bachelor's Degree in Nuclear Engineering, Physics, or closely related scientific discipline or the ...

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All JobsEntry Level Nuclear Criticality Safety Engineer Jobs

Entry Level Nuclear Criticality Safety Engineer information

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$106.5K

$154.5K

$186K

How much do entry level nuclear criticality safety engineer jobs pay per year?

As of Jun 14, 2026, the average yearly pay for entry level nuclear criticality safety engineer in the United States is $154,474.00, according to ZipRecruiter salary data. Most workers in this role earn between $146,000.00 and $161,000.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as an Entry Level Nuclear Criticality Safety Engineer, and why are they important?

To thrive as an Entry Level Nuclear Criticality Safety Engineer, a solid background in nuclear engineering, physics, or a related field—often with a relevant bachelor's degree—is essential. Familiarity with nuclear safety codes, Monte Carlo simulation software (like MCNP), and regulatory standards is commonly required. Strong analytical thinking, attention to detail, and effective communication help individuals excel in collaborative and safety-focused environments. These skills and qualifications are vital to ensure accurate risk assessments, regulatory compliance, and the prevention of criticality accidents in nuclear facilities.

What does an Entry Level Nuclear Criticality Safety Engineer do?

An Entry Level Nuclear Criticality Safety Engineer assists in evaluating and controlling nuclear processes to prevent accidental criticality events, which can release dangerous levels of radiation. They help develop procedures, perform safety analyses, and review facility operations to ensure compliance with nuclear safety regulations. Typically, they work under the supervision of experienced engineers while gaining hands-on experience with nuclear materials and safety systems. Their role is essential for maintaining the safety of nuclear facilities and protecting workers and the environment.

What is the difference between Entry Level Nuclear Criticality Safety Engineer vs Entry Level Nuclear Safety Analyst?

AspectEntry Level Nuclear Criticality Safety EngineerEntry Level Nuclear Safety Analyst
CredentialsBachelor's in nuclear engineering or related field; certifications like NEA or NQA preferredBachelor's in nuclear, mechanical, or safety engineering; certifications vary
Work EnvironmentDesign review, safety analysis, compliance in nuclear facilitiesSafety assessments, incident analysis, regulatory reporting in nuclear plants
Employer & Industry UsageNuclear power plants, research reactors, DOE facilitiesNuclear power plants, regulatory agencies, consulting firms

While both roles focus on nuclear safety, the Entry Level Nuclear Criticality Safety Engineer specializes in preventing nuclear chain reactions, whereas the Entry Level Nuclear Safety Analyst concentrates on overall safety assessments and compliance. Both positions require similar educational backgrounds and often work within the same industry environments, but their specific responsibilities differ based on safety focus areas.

What typical challenges might an entry level Nuclear Criticality Safety Engineer face in their first year on the job?

As an entry level Nuclear Criticality Safety Engineer, you may encounter challenges such as adapting to complex regulatory requirements, mastering technical safety analysis software, and understanding the intricacies of nuclear facility operations. You’ll also need to develop effective communication skills to collaborate with multidisciplinary teams and clearly present safety recommendations. Learning how to balance thorough risk assessment with practical operational constraints is a key part of the role’s early learning curve.
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Entry Level Nuclear Criticality Safety Engineer jobs near you
Infographic showing various Entry Level Nuclear Criticality Safety Engineer job openings in the United States as of June 2026, with employment types broken down into 89% Full Time, and 11% Part Time. Highlights an 100% In-person job distribution, with an average salary of $154,474 per year, or $74.3 per hour.
Nuclear Criticality Safety Engineer (3786)

Nuclear Criticality Safety Engineer (3786)

Navarro Inc.

Oak Ridge, TN

Full-time

Posted 10 days ago

Job description

Navarro Research and Engineering is recruiting for multiple junior and senior Nuclear Criticality Safety Engineering positions located in Oak Ridge, TN, Paducah, KY, and Portsmouth, OH.

Navarro is a premier contractor providing high-quality technical services to DOE, NASA, and DOD. Navarro's success is based on our customer service focus and our well-known responsiveness and innovation. In all we do, either in corporate management or in our services to our clients, we seek for the most effective and efficient approaches to provide best value to our clients.

Performs NCS Engineering job functions as assigned by management. Typical job responsibilities assist and support management in NCS program implementation and engineering system design; which may include duties or activities in one or more of the following functional areas, in addition to other duties as assigned:

  • Perform nuclear criticality safety reviews of existing and proposed nuclear material operations and facilities, facility designs and modifications; and research or processing activities involving fissionable materials.
  • Develop nuclear criticality safety evaluations and program documents that meet applicable NRC/DOE requirements and standards, utilizing nuclear criticality safety software (e.g., SCALE or MCNP) as needed, in support of safe nuclear material operations and maintenance activities.
  • Complete reviews of nuclear criticality safety evaluations and program documents to ensure technical accuracy and compliance with applicable NRC/DOE requirements and standards.
  • Perform tracking and trending of NCS performance.
  • Support NCS operability or engineering evaluations when necessary.
  • Support NCS program implementation and training.
  • Support the development of hazards analysis, accident analysis, and hazard controls and documents the results in a nuclear facility safety basis (i.e., documented safety analysis and technical safety requirements), as requested.
  • Perform NCS work in accordance with contractor or client program documents and procedures.
  • Maintain knowledge of and demonstrates ability to perform work safely in accordance with all approved safety policies, procedures and applicable regulations and performs assigned duties in a safe manner.

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