Nuclear Criticality Safety Engineer Energy

AtkinsRéalis•Oak Ridge, TN
•Onsite

About The Position

AtkinsRéalis is seeking a Nuclear Criticality Safety Engineer to join its team in the Oak Ridge, Tennessee office. The role supports implementation of the Nuclear Criticality Safety (NCS) Program and facility activities to ensure criticality safety. The engineer prepares and peer reviews NCS documents, performs implementation walkdowns, participates in reviews and investigations, and supports NCS training and compliance activities. The position also supports the execution of Integrated Safety Management System principles and the Isotek Safety Culture.

Requirements

  • Baccalaureate degree in Nuclear Engineering or Physics.
  • Proficient knowledge of Microsoft Office.
  • Strong verbal and written communication skills.
  • Ability to describe the essential requirements, relationships, and importance of applicable DOE Orders and Standards with respect to NCS.
  • Ability to perform calculations with Monte Carlo neutron transport codes.
  • Ability to perform hand calculations for criticality.
  • U.S. citizenship is required for AtkinsRéalis/Isotek Systems Project positions.
  • Must meet eligibility requirements for access to classified information or matter and be subject to a Federal background investigation.
  • Must have Real ID-compliant identification to access the work location.

Nice To Haves

  • One year of NCS-related nuclear experience; preferred but not required.

Responsibilities

  • Stop work without fear of reprisal when unsafe conditions could affect personnel safety or create environmental risk.
  • Support implementation of the Nuclear Criticality Safety (NCS) Program and facility activities to ensure criticality safety.
  • Prepare and peer review Fissile Material Operations (FMO) Screens, NCS Evaluations (NCSEs), NCS Approvals (NCSAs), NCS Clarifications, NCS Reports, and Criticality Accident Alarm System Needs Analyses.
  • Perform NCSE/A implementation walkdowns and provide input to site emergency plans and pre-incident plans as requested.
  • Maintain awareness of assigned FMOs and NCS-related issues within the Project.
  • Participate in critiques and investigations involving NCS issues.
  • Review Conditions Adverse to Quality, including Non-Conformance Reports and Findings, for NCS impacts.
  • Perform audits, surveillances, and assessments of the NCS Program and Project conformance to NCSA and NCS-related contract requirements.
  • Review and approve work packages, procedures, administrative aids, and other Project documents for compliance with NCS requirements.
  • Review and approve designs and plans that could affect NCS.
  • Review applicable facility Safety Basis documents for NCS integration.
  • Participate in Hazard Evaluation Studies and Hazards Analysis in support of Project activities.
  • Identify NCS training needs, deliver NCS training, and evaluate its effectiveness.
  • Maintain knowledge of NCS-related standards, guides, and codes.
  • Support execution of Integrated Safety Management System guiding principles and core functions and the Isotek Safety Culture.
  • Perform other duties as assigned.

Benefits

  • Medical insurance
  • Dental insurance
  • Vision insurance
  • Company-paid life insurance
  • Short- and long-term disability benefits
  • Employer-matched 401(k) with 100% vesting
  • Employee stock purchase plan
  • Paid Time Off
  • Leave of absence options
  • Flexible work options
  • Recognition and employee satisfaction programs
  • Employee assistance program
  • Voluntary benefits
© 2026 Teal Labs, Inc
Privacy PolicyTerms of Service