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

As of Jul 26, 2026, the average yearly pay for 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 does a Nuclear Criticality Safety Engineer do?

A Nuclear Criticality Safety Engineer is responsible for ensuring that nuclear materials are handled, stored, and processed in a manner that prevents unintended nuclear chain reactions, known as criticality accidents. They analyze facility designs, operating procedures, and accident scenarios to assess risks and implement safety controls. Their work involves developing safety evaluations, performing calculations, and providing guidance on safe practices. This role is crucial in nuclear power plants, research labs, and facilities that handle fissile materials to protect workers, the public, and the environment.

What Does a Nuclear Criticality Safety Engineer Do?

As a nuclear criticality safety engineer, your responsibilities include conducting research and evaluating methods of transportation, handling, and storage of nuclear fuel to prevent an accident such as a nuclear reaction. You study and review research on nuclear fuel characteristics and calculation documents, as well as conduct an analysis of fuel transfer and storage plans provided by nuclear plants. Other duties include identifying potential hazards and areas in a nuclear plant that may be violating regulations, designing new methods for transport or storage, preparing proposal reports describing your recommendations, and submitting these reports to the government review board.

How does a Nuclear Criticality Safety Engineer typically collaborate with other professionals on-site?

Nuclear Criticality Safety Engineers work closely with a multidisciplinary team, including reactor operators, health physicists, process engineers, and regulatory compliance staff. They participate in safety reviews, provide technical guidance during facility modifications, and help develop and implement criticality safety procedures. Regular communication and teamwork are essential, as these engineers must ensure all stakeholders understand and follow safety protocols to prevent criticality accidents. Collaboration often includes attending interdepartmental meetings, conducting training sessions, and performing joint facility walkthroughs.

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

AspectNuclear Criticality Safety EngineerNuclear Safety Engineer
CertificationsOften requires certifications like ANSI/ANS-8 or equivalentMay require general nuclear safety or engineering certifications
Work EnvironmentFocuses on criticality safety in nuclear facilities and operationsEncompasses broader nuclear safety aspects including radiation protection and accident prevention
Industry UsagePrimarily in nuclear fuel handling, processing, and reactor operationsAcross nuclear power plants, research reactors, and regulatory agencies

The Nuclear Criticality Safety Engineer specializes in preventing nuclear chain reactions in fissile materials, ensuring safe handling and storage. In contrast, the Nuclear Safety Engineer has a broader role, addressing overall safety protocols, radiation protection, and accident prevention in nuclear facilities. While both roles require a strong understanding of nuclear principles, the Criticality Safety Engineer focuses specifically on criticality risks, making their expertise more specialized within the nuclear safety field.

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

To thrive as a Nuclear Criticality Safety Engineer, you need a strong background in nuclear engineering, physics, or a related field, often supported by a relevant bachelor's or master's degree. Familiarity with criticality safety codes (such as SCALE or MCNP), regulatory compliance standards, and radiation monitoring systems is essential. Attention to detail, strong problem-solving abilities, and effective communication skills are crucial for risk assessment and collaboration with multidisciplinary teams. These skills ensure the safe handling and processing of nuclear materials, preventing criticality accidents and ensuring regulatory compliance.
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Nuclear Criticality Safety Engineer jobs near you
Infographic showing various Nuclear Criticality Safety Engineer job openings in the United States as of July 2026, with employment types broken down into 7% Locum Tenens, 5% As Needed, 85% Full Time, and 3% Contract. Highlights an 91% Physical, 5% Hybrid, and 4% Remote job distribution, with an average salary of $154,474 per year, or $74.3 per hour.
Nuclear Criticality Safety Engineer

Nuclear Criticality Safety Engineer

MS Technology, Inc.

Oak Ridge, TN • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 25 days ago

Job description

MS Technology, Inc. is seeking a Nuclear Criticality Safety Engineer to support our clients in Oak Ridge, TN.
The Nuclear Criticality Safety Engineer supports nuclear safety activities for the Uranium Processing Facility (UPF), including design, construction, and operational readiness. This role is responsible for developing, reviewing, and implementing criticality safety evaluations and technical basis documents, ensuring compliance with nuclear criticality safety (NCS) requirements. The position involves performing facility walkdowns, supporting safety reviews and boards, resolving safety discrepancies, and contributing to the overall NCS program. The engineer collaborates with multidisciplinary teams to support safe operations, maintain regulatory compliance, and uphold a strong safety culture within DOE and/or commercial nuclear environments.
Responsibilities
  • Support nuclear engineering facets related to the Uranium Processing Facility (UPF) design and construction of the facility.
  • Develop, revise, and peer-review Criticality Safety Evaluations (CSEs), Technical Deviations (TDs), and other NCS technical basis documents.
  • Perform facility walkdowns, review implementing documents, and participate in Operational Safety Boards.
  • Resolve non-compliance or discrepancies in safety requirements.
  • Develop calculations related to nuclear facilities.
  • Ensure critical design needs are met.
  • Develop, review, and implement Nuclear Criticality Safety Evaluations (NCSEs) and Determinations (NCSDs).
  • Assist in implementing and maintaining the NCS program, including operability evaluations and problem report dispositions.
  • Maintain a strong safety culture, implement zero-accident philosophies, and ensure safe work practices in operational areas.
  • Review operational areas to assess NCS compliance.
  • Perform NCS evaluations.

Requirements
  • Bachelor’s Degree in Engineering; may look at other candidates with technical degree and additional relevant experience
  • 15+ years of relevant experience
  • United States (U.S.) Citizen
  • Must understand nuclear criticality safety procedures
  • Must be able to be qualified to ANS-8.26
  • Must have excellent coordination and communication skills to work with various teams and stakeholders
  • Must have experience with DOE and/or commercial nuclear projects

 

Benefits:

All eligible employees enjoy an excellent benefits package, including medical/dental/vision insurance, short/long-term disability, life insurance, 401(k), paid time off including holidays, and tuition reimbursement.

EEO Statement:

MSTI is an equal-opportunity employer. All qualified candidates, including individuals with disabilities and protected veterans, are encouraged to apply. MSTI is an E-Verify employer. If you have difficulty using the online application system or need an accommodation to apply due to a disability, please email: HR@mstechnology.com.

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