Criticality Safety Engineer

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.
• Develop, revise, 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.

Education Requirements

• Alternate combination of education and experience will be considered.

Compensation Details

$115,000+

Benefits Overview

• Health, dental, and vision insurance
• Paid time off and holidays
• Retail benefits (including 401(k) matching)
• Retirement benefits
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Original Posting

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.