Nuclear Criticality Safety Engineer Jobs (NOW HIRING)

We are seeking a Nuclear Criticality Safety Engineer Energy, to join our Team in our Oak Ridge, TN office. Your role Stops work without fear of reprisal for unsafe conditions potentially affecting personnel safety or environmental risk. Supports implementation of the Nuclear Criticality Safety (NCS) Program. Supports facility activities to ensure criticality safety. Prepares and peer reviews NCS documents Fissile Material Operations (FMO) Screens, NCS Evaluations (NCSEs), NCS Approvals (NCSAs), NCS Clarifications, NCS Reports, and Criticality Accident Alarm System Needs Analyses. Performs NCSE/A implementation walkdowns and provides input to site emergency plans and pre-incident plans, as requested. Maintains awareness with assigned FMOs and NCS-related issues within Project. Participates in critiques/investigations involving NCS issues. Reviews Conditions Adverse to Quality (e.g., Non-Conformance Reports, Findings) for NCS impacts. Performs audits, surveillances, and assessments of the NCS Program and Project conformance to NCSA and NCS-related contract requirements. Reviews and approves work packages, procedures, administrative aids, and other Project documents to ensure compliance with NCS requirements. Reviews and approves designs and plans that potentially impact NCS. Reviews applicable facility Safety Basis documents for NCS integration. Participates in Hazard Evaluation Studies/Hazards Analysis in support of Project activities. Identifies the need for NCS training to support Project activities. Provides delivery of NCS training and the evaluation of its effectiveness. Maintains knowledge of NCS-related standards, guides, and codes. Supports the execution of Integrated Safety Management System guiding principles and core functions and the Isotek Safety Culture. Performs other duties as assigned.

Requires a Baccalaureate Degree in Engineering or Related Science. Minimum 2 years’ related experience, 1-year nuclear experience. Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified information or matter. Proficient knowledge of Microsoft Office. Strong communication, verbal and written 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. Applicants must have Real ID compliant identification to access the work location. U.S. citizenship required for AtkinsRéalis/Isotek Systems Project positions. Must be a U.S. citizen in order to be considered.

At AtkinsRéalis, our values—Safety, Integrity, Collaboration, Innovation, and Excellence—are more than just words. They are the foundation of who we are and how we work. These principles shape our culture, guide our decisions, and inspire us to create an environment where every team member feels empowered to grow, succeed, and make a meaningful impact. Depending on your employment status, AtkinsRéalis benefits may include medical, dental, vision, company-paid life and short- and long-term disability benefits, employer-matched 401(k) with 100% vesting, employee stock purchase plan, Paid Time Off, leaves of absences options, flexible work options, recognition and employee satisfaction programs, employee assistance program, and voluntary benefits. You can review our comprehensive benefits page here.

We’re AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world’s infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We’re committed to leading our clients across our various end markets to engineer a better future for our planet and its people. Find out more.

Expected compensation range is between $57,000 - $96,000 annually depending on skills, experience, and geographical location.

AtkinsRéalis is an equal opportunity, Drug-Free employer EOE/Veteran/Disability Please review AtkinsRéalis’ Equal Opportunity Statement here.

We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences.

Worker Type Employee Job Type Regular At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences. Created by the integration of long-standing organizations dating back to 1911, AtkinsRéalis is a world-class engineering services and nuclear company dedicated to engineering a better future for our planet and its people. We create sustainable solutions that connect people, data and technology to transform the world’s infrastructure and energy systems. We deploy global capabilities locally to our clients and deliver unique end-to-end services across the whole life cycle of an asset including consulting, advisory & environmental services, intelligent networks & cybersecurity, design & engineering, procurement, project & construction management, operations & maintenance, decommissioning and capital. The breadth and depth of our capabilities are delivered to clients in strategic sectors such as Engineering Services, Nuclear and Capital.

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