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Internship Nuclear Criticality Safety Engineer Jobs

Amentum

Criticality Safety Engineer

Oak Ridge, TN · On-site

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 ...

Pae

Criticality Safety Engineer

Aiken, SC

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 ...

Amentum

Criticality Safety Engineer

Aiken, SC · On-site

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 ...

Pae

Criticality Safety Engineer

Oak Ridge, TN · On-site

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 ...

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

As of Aug 17, 2026, the average yearly pay for internship 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 an internship nuclear criticality safety engineer do?

An Internship Nuclear Criticality Safety Engineer assists experienced engineers in analyzing and managing the safety risks associated with handling and storing nuclear materials. Their duties typically include performing calculations, reviewing safety procedures, helping to develop criticality safety evaluations, and supporting compliance with safety regulations. Interns may also participate in safety audits, learn about regulatory requirements, and collaborate with other departments to ensure the safe operation of nuclear facilities.

What types of projects and responsibilities can an intern expect as a nuclear criticality safety engineer?

As an intern in Nuclear Criticality Safety Engineering, you can expect to assist with risk assessments, perform calculations, and review safety procedures related to the handling and storage of nuclear materials. Interns often work under the supervision of experienced engineers, supporting compliance documentation, participating in safety audits, and collaborating with multidisciplinary teams such as reactor operators and health physicists. This role provides valuable hands-on experience in regulatory requirements and criticality safety analysis, laying a strong foundation for a career in nuclear engineering.

What are the key skills and qualifications needed to thrive as an internship nuclear criticality safety engineer?

To thrive as an Internship Nuclear Criticality Safety Engineer, you generally need a solid background in nuclear engineering, physics, or a related field, supported by coursework in nuclear safety and criticality. Familiarity with nuclear simulation software (such as SCALE or MCNP), radiation detection instruments, and safety analysis tools is often expected. Strong analytical thinking, attention to detail, and effective communication skills help interns collaborate with multidisciplinary teams and convey complex safety information clearly. These skills and qualities are vital to ensure precise safety assessments and uphold regulatory compliance in nuclear environments.
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Internship Nuclear Criticality Safety Engineer jobs near you
Infographic showing various Internship 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

Amentum

Oak Ridge, TN • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 7 days ago

Job description

Amentum is a global leader in advanced engineering and innovative solutions, supporting critical missions across defense, intelligence, energy, and civilian sectors. Our people are our competitive advantage, driven by purpose, collaboration, and a commitment to delivering excellence for our customers and communities. We are currently seeking a Criticality Safety Engineer to support our Oakridge, TN office. The Engineer will provide engineering support for U.S. Department of Energy (DOE) facilities and projects in Design Services. The Engineer must have demonstrated experience in preparing documents to support the development of or changes to complex engineering designs or design changes supporting facility or project scoped work.
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 1-2 years of Nuclear Criticality Safety (NCS) experience is required (Nuclear Engineering degree preferred) or 7 years of equivalent technical experience in place of a B.S.
  • Experience in Approach to Critical (e.g., NCSP Hands-On Criticality Safety Course) preferred.
  • 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:
06/11/2026 - 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 at Labor Laws Posters.

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