Criticality Safety Engineer

Amentum; Aiken (SC); On-site; USD 103,500 - 126,500; Full time

Benefits offered by this job

Health, dental & vision insurance

Paid time off and holidays

401(k) matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Disability and life insurance

Pet insurance

Job summary

Amentum is seeking a Nuclear Criticality Safety Engineer for the AIKEN, SC office at the Savannah River Site. The role provides engineering support for DOE facilities, developing or modifying complex NCS analyses, CSEs, and related documentation.

The candidate will lead NCS evaluations, mentor junior analysts, and participate in training, audits, and emergency response planning. A Bachelor's in nuclear/engineering/science and 4–5 years NCS experience or equivalent is required; US citizenship and

Qualifications

• Bachelor’s degree with 4–5 years NCS experience or 5 years equivalent in place of a B.S.
• US citizen with ability to obtain DOE Q clearance
• Experience supporting DOE facilities and criticality safety program development

Responsibilities

• Provide technical guidance to operating organizations on NCS evaluations
• Lead and participate in NCS evaluations, reviews, and audits
• Mentor less experienced NCS Analysts and Analysts In-Training
• Develop and review NCS documentation such as CSEs and DACs
• Support NCS training, emergency response, and programmatic policy updates

Skills

Attention to detail

NCS experience

US citizenship eligibility

Education

Bachelor's degree in nuclear engineering, engineering, math, or science

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 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 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 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:

06/09/2026 - 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.