Amentum is seeking a Nuclear Criticality Safety Engineer based in our Oakridge, TN 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 participate 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 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 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 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 02/25/2026 - 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. #J-18808-Ljbffr Amentum
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