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Nuclear Criticality Safety; Engineer in Training

Job in Oak Ridge, Anderson County, Tennessee, 37830, USA
Listing for: Y-12 National Security Complex
Apprenticeship/Internship position
Listed on 2026-09-14
Job specializations:
  • Engineering
    Safety Engineer, Quality Engineering, Environmental Engineer
Salary/Wage Range or Industry Benchmark: 65000 - 85000 USD Yearly USD 65000.00 85000.00 YEAR
Job Description & How to Apply Below

Location: Oak Ridge, TN

Job Title: Nuclear Criticality Safety (Engineer in Training)

Career Level From: Associate

Career Level To: Specialist

Organization: Y-12 Engineering )

Job Specialty: Nuclear Engineering Safety

What You’ll Do

The Engineer in Training is an entry level position. As such this positions provides technical capabilities in Nuclear Criticality Safety (NCS) to ensure fissile materials are processed, stored, transferred, and handled safely so that personnel and property are protected against a criticality accident while under the tutelage of an experienced NCS engineer.

Learns to performs Criticality Safety Analysis of equipment, processes, and reviews procedures prescribing correct methods, control requirements, and limitations. Performs or participates in surveillance, inspections, walkthroughs, appraisals, or audits of fissile material operations to ensure compliance with Nuclear Criticality Safety Approvals, Nuclear Safety rules, including Safety Analysis Reports, Safety Assessments, Safety Reviews, and risk assessments/analyses.

Provides operating areas with specific NCS professional interpretations and advice as concurred with by experienced NCS engineers. Validates, maintains, and operates nuclear computer codes and nuclear cross-sections.

What You Can Expect
  • Meaningful work and unique opportunities to support missions vital to national and global security
  • Top-notch, dedicated colleagues
  • Generous pay and benefits with a stable organization
  • Career advancement and professional development programs
  • Work-life balance fostered through flexible work options and wellness initiatives
Minimum

Job Requirements
  • Bachelor of Science in Engineering/Physical Science [Chemistry, Physics, or related] from an Engineering Accreditation Commission (EAC) Accreditation Board of Engineering and Technology (ABET) accredited program in the United States or designated equivalents from Canada or Mexico, the Washington Accord, or the list of substantially equivalent as documented by ABET. OR MS in Engineering/Physical science. OR PhD in Engineering/Physical science. (Advanced degrees require a technical undergraduate degree.)
  • There is a minimum Grade Point Average (GPA) requirement up to 4 years post-graduation at time of offer and confirmed by transcript. Beyond four years from graduation, engineering experience will supersede GPA as a requirement for hire.
    • 3.0/4.0 minimum cumulative GPA for Bachelor's degree
    • 3.3 minimum cumulative GPA for Master's degree
    • 3.5 minimum cumulative GPA for Ph.D.
Preferred

Job Requirements
  • Nuclear Engineering degree or graduate from either the US Navy Nuclear Power School or the Bettis Reactor Engineering School
  • Excellent written and oral communication skills
  • 3+ years of work experience in nuclear industry
  • Prior qualification as an NCS engineer at a DOE or NRC regulated facility
  • Experience with MCNP and/or KENO
  • Proficiency with a computing language such as Python
  • Security clearance
Why Y-12?

You get #morethanajob. We encourage employees to achieve a healthy personal balance among home, work and the community. One of the ways we embrace work-life balance is by offering flexible work arrangements that provide alternatives to the traditional workweek, while still meeting business needs. Top talent and personal commitment mean more to our success than any other factors, so we reward our people with the kinds of benefits that make a positive difference in the quality of their lives.

Benefits such as: medical plan, prescription drug plan, vision plan, dental plan, employer matched 401(k) savings plan, disability coverage, education reimbursement and many more. Want to stay healthy and fit but hate the cost of a gym membership? Take advantage of one of our onsite workout facilities and eat…

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