Enter a job title or keyword

Senior Reactor Design Engineer


Job Location:

West Mifflin, PA - USA

Yearly Salary: USD 95700 - 149600
Posted: 17 October 2026 (2 days ago)
Application Deadline: 14 January 2027
Vacancies: 1 Vacancy

Job Summary

Working at the Naval Nuclear Laboratory we foster pride in belonging to an organization whose culture is made up of these core values: Trust Empowerment and Collaboration. Our company promotes a positive culture while ensuring the safety and reliability of our nations naval nuclear reactors and training the Sailors who operate those reactors in the U.S. Navys submarines and aircraft carrier Fleets. Looking for a lifetime career Apply today!

Job Description

If you are an Engineer with a strong interest in mechanical design and analysis and want to work directly with world class engineers scientists researchers and technicians that support the worlds best Navy apply today!

The Advanced Mechanical Design group is seeking a highly motivated self-driven mechanical engineer for new reactor core design development. This is a unique opportunity to get in on the early stage of a new reactor design and work in a dynamic collaborative environment.

The teams near-term focus is (1) development and structural evaluation of the concept design for the programs next reactor core; (2) the advent of mechanical improvements to solve existing fleet challenges through the development of new and novel mechanical concepts; and (3) support of manufacturing development at the laboratories and manufacturing vendor.

Reactor design evaluations may be performed with simple first-principles based scoping tools up through detailed analyses utilizing the latest structural analysis codes. The successful candidate will work with a diverse team of engineers who reside at both the Knolls and Bettis sites. The position requires effective communication within the team with other core design disciplines and with stakeholder organizations including materials and manufacturing.

A knowledgeable staff is available for mentoring training and guidance. Through exciting and challenging diverse work assignments and a strong mentoring culture NNL engineers have the opportunity to continue gaining technical skills and broadening their experience throughout their careers.

Required Combination of Knowledge and Skill
  • Bachelors degree from an accredited college or university in a related technical engineering or science field and a minimum of 6 years of relevant experience; or
  • Masters degree from an accredited college or university in a related technical engineering or science field and a minimum of 4 years of relevant experience; or
  • Doctorate degree from an accredited college or university in a related technical engineering or science field and a minimum of 1 year of relevant experience; or
  • Currently a Senior Reactor Training Engineer Refueling Engineer or Field (RPCO) Engineer at the Company.
Preferred Skills
  • Ability to work and demonstrate leadership in a team environment
  • Working knowledge of pressurized water reactors
  • Experience with structural analyses including the use of FEA software
  • Experience with the development of design drawings and manufacturing processes
  • Proven effectiveness in technical writing and presentations
Compensation and Benefits
  • Health Dental Vision & Voluntary Benefits
  • Disability Life & Accident Insurance
  • 401(k) Savings program & Capital Accumulation Plan
  • Personal & Medical Time Off
  • Paid Parental Leave
  • Flexible Work Schedules
  • Tuition Assistance for Eligible Employees
  • Student Debt Benefit Personal Time Off Sell Program
  • Employee Assistance Program (EAP)
  • Wellness Program
  • Visit us online to view all NNL benefits!
Pay Range
$95700.00 - $149600.00 annually
Salary information provided is a general guideline only. Annual salary is based upon candidate experience and qualifications as well as market and business considerations.

The Naval Nuclear Laboratory is operated for the U.S. Department of Energy (DOE) by Fluor Marine Propulsion LLC (FMP) a wholly owned subsidiary of Fluor Corporation. Naval Nuclear Laboratory personnel are FMP employees who work at four DOE facilities: Bettis Atomic Power Laboratory Knolls Atomic Power Laboratory Kenneth A. Kesselring Site and Naval Reactors Facility and at the U.S. Department of Defense-owned Nuclear Power Training Unit-Charleston. FMP employees also have an established presence at numerous shipyards satellite and vendor locations.

For more than 75 years the Naval Nuclear Laboratory has developed advanced nuclear propulsion technology provided technical support and trained world-class nuclear operators to ensure the safe and reliable operation of our nations submarine and aircraft carrier fleets. The Naval Nuclear Laboratory is a national asset solely dedicated to the Naval Nuclear Propulsion Program. We rely on the dedication and innovation of our nearly 8000 engineers scientists technicians and support personnel.

All candidates must be U.S. citizens. Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified matter. FMP is a government contractor and maintains a drug free workplace and workforce. All candidates must be able to pass a drug test in compliance with FMP company policy and 10 CFR 707. Marijuana is a Federal Schedule I controlled substance and illegal under Federal Law. Therefore FMP is required to test for marijuana.

Fluor Marine Propulsion LLC is an Equal Opportunity Employer including disability/vets. All qualified applicants will receive consideration for employment without regard to race color age sex religion national origin disability veteran status genetic information or any other criteria protected by federal state or local law.


Required Experience:

Senior IC