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Nuclear Criticality Safety Engineer Jobs (NOW HIRING)

Criticality Safety Engineer

Richland, WA · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Amentum is seeking a Nuclear Criticality Safety Engineer based out of our Richland, WA office.Candidates will obtain site specific Nuclear Criticality Safety (NCS) Analyst Qualification to support ...

Criticality Safety Engineer

Aiken, SC

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We are currently seeking a Nuclear Criticality Safety Engineer to support our AIKEN, SC office out at the Savannah River Site (SRS). The Engineer will provide engineering support for U.S. Department ...

Criticality Safety Engineer

Richland, WA · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Amentum is seeking a Nuclear Criticality Safety Engineer based out of our Richland, WA office. Candidates will obtain site specific Nuclear Criticality Safety (NCS) Analyst Qualification to support ...

Criticality Safety Engineer

Aiken, SC · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We are currently seeking a Nuclear Criticality Safety Engineer to support our AIKEN, SC office out at the Savannah River Site (SRS). The Engineer will provide engineering support for U.S. Department ...

Criticality Safety Engineer

Oak Ridge, TN · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The Engineer will provide engineering support for U.S. Department of Energy (DOE) facilities and ... Candidates will obtain site specific Nuclear Criticality Safety (NCS) Analyst Qualification to ...

Criticality Safety Engineer

Oak Ridge, TN

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The Engineer will provide engineering support for U.S. Department of Energy (DOE) facilities and ... Candidates will obtain site specific Nuclear Criticality Safety (NCS) Analyst Qualification to ...

Senior Nuclear Criticality Safety Engineer

Lynchburg, VA · On-site

$86K - $136K/yr

  • Medical

  • Dental

  • Retirement

On-site in Lynchburg, Virginia Your Day to Day as a Senior Nuclear Criticality Safety Engineer: * The successful candidate will perform Nuclear Criticality Safety (NCS) evaluations to define the ...

Senior Nuclear Criticality Safety Engineer

Lynchburg, VA

$86K - $136K/yr

  • Medical

  • Dental

  • Retirement

On-site in Lynchburg, Virginia Your Day to Day as a Senior Nuclear Criticality Safety Engineer: * The successful candidate will perform Nuclear Criticality Safety (NCS) evaluations to define the ...

Senior Nuclear Criticality Safety Engineer

Lynchburg, VA · On-site

$86K - $136K/yr

  • Medical

  • Dental

  • Retirement

On-site in Lynchburg, Virginia Your Day to Day as a Senior Nuclear Criticality Safety Engineer: * The successful candidate will perform Nuclear Criticality Safety (NCS) evaluations to define the ...

Showing results 41-60

Nuclear Criticality Safety Engineer information

See salary details

$106.5K

$154.5K

$186K

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

As of Aug 15, 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.

What cities are hiring for Nuclear Criticality Safety Engineer jobs?

Cities with the most Nuclear Criticality Safety Engineer job openings:

What are the most commonly searched types of Nuclear Criticality Safety Engineer jobs?

The most popular types of Nuclear Criticality Safety Engineer jobs are:

Who are the top companies hiring for Nuclear Criticality Safety Engineer jobs?

The top employers for Nuclear Criticality Safety Engineer jobs are:

What states have the most Nuclear Criticality Safety Engineer jobs?

States with the most job openings for Nuclear Criticality Safety Engineer jobs include:

What job categories do people searching Nuclear Criticality Safety Engineer jobs look for?

The top searched job categories for Nuclear Criticality Safety Engineer jobs are:

What are popular job titles related to Nuclear Criticality Safety Engineer jobs?

For Nuclear Criticality Safety Engineer jobs, the most frequently searched job titles are:

Infographic showing various Nuclear Criticality Safety Engineer job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 79% Full Time, 17% Part Time, 2% Contract, and 1% Nights. Highlights an 99% Physical, and 1% Remote job distribution, with an average salary of $154,474 per year, or $74.3 per hour.

Criticality Safety Engineer

Pae

Richland, WA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 8 days ago


Job description

Amentum is seeking a Nuclear Criticality Safety Engineer based out of our Richland, WA office.Candidates will obtain site specific Nuclear Criticality Safety (NCS) Analyst Qualification to support implementation of a DOE Approved Nuclear Criticality Safety Program in an operating non-reactor nuclear facility.

Job Responsibilities

  • Provide technical guidance to operating organizations.
  • Collaborate with operating organization personnel on NCS evaluations as the lead NCS Analyst.
  • Perform independent reviews of NCS evaluations.
  • Conduct periodic reviews of fissionable material operations.
  • Lead and/or participating in NCS response to programmatic issues and criticality process deviations/infractions.
  • Participate in NCS emergency response preparation (emergency procedures, plans, exercises, and drills).
  • Independently prepare, review, and/or present technical reports to the criticality safety community (e.g. American Nuclear Society, etc.).
  • Conduct NCS training for all levels of employees involved in fissionable material operations.
  • Assist in the development and/or review of new or proposed changes to existing NCS programmatic policy and implementing documents.
  • Lead and/or participate in assessments and audits of the NCS Program.
  • Mentor of less experienced Nuclear Criticality Safety (NCS) Analysts and Analysts In-Training on all aspects of criticality safety.
  • Development, revision, and review of Nuclear Criticality Safety (NCS) documentation such as Criticality Safety Evaluations (CSEs), Nuclear Criticality Safety Design Analysis, and Calculations (DACs) and various other NCS technical basis documentation.
  • Complete required NCS annual Operational Reviews.
  • Daily nuclear facility support; consisting of facility walkdowns, review of NCS requirements, implementing documents, participation at facility Operational Safety Boards, etc.

Required Skills/Abilities

  • Bachelor's degree in nuclear, engineering, math, or science with minimum of 4-5 years of Nuclear Criticality Safety (NCS) experience is required (Nuclear Engineering degree preferred) or 5 years of equivalent technical experience in place of a B.S.
  • Involvement in industry committees preferred (e.g., ANS).
  • Min of 3 years of DOE-specific experience is highly preferred
  • Candidate must be a US citizen.
  • Candidate must have the ability to obtain and maintain a DOE "Q" security clearance.
  • Demonstrated keen attention to detail.

Educational Requirements

  • Alternate combination of education and experience will be considered.

Compensation Details:

$115,000

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

  • Health, dental, and vision insurance

  • Paid time off and holidays

  • Retirement benefits (including 401(k) matching)

  • Educational reimbursement

  • Parental leave

  • Employee stock purchase plan

  • Tax-saving options

  • Disability and life insurance

  • Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:

08/07/2026 - Until Filled

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language atLabor Laws Posters.