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Nuclear Engineer; Thermal Hydraulic), Senior

Listing for: Naval Nuclear Laboratory
Full Time position Listed on 2026-11-06
Job specializations:
Salary/Wage Range or Industry Benchmark: 95700 USD Yearly USD 95700.00 YEAR

Job Description & How to Apply Below

Position: Nuclear Engineer (Thermal Hydraulic), Senior
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 nation's naval nuclear reactors, and training the Sailors who operate those reactors in the U.S. Navy's submarines and aircraft carrier Fleets. Looking for a lifetime career? Apply today!

Job Description Are you interested in learning about the nuclear power propulsion systems on the US Navy's aircraft carriers and submarines? The Naval Nuclear Laboratory is seeking an engineer to join the Fleet Reactor Engineering department to lead evaluations of a wide range of nuclear reactor operations and transients. This is an excellent opportunity to gain an integrated understanding of how various reactor designs operate while developing analytical skills that support our important mission and keep our sailors, the public, and the environment safe.

There are multiple openings in several units associated with this posting.

The successful candidate's duties could include, but are not limited to:

Thermal hydraulic model development and analysis, researching and developing models for reactor plant safety, understanding and communicating nuclear plant transient progression, developing scripts to run our models and post-process results, working productively and efficiently with a team of knowledgeable professionals to document various analyses, and understanding and communicating results to coworkers, managers, and Naval Reactors.

NNL develops and supports the world's safest and most advanced reactor plants and as an engineer in the Fleet Reactor Engineering department, your contributions will be directly tied to this important mission!

Required Combination of Knowledge and Skill Bachelors degree from an accredited college or university in a related 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 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 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 Degrees in Nuclear, Chemical, and Mechanical Engineering are preferred, but not required. In-depth experience with thermal-hydraulic analysis, scripting, and coding preferably with computer codes such as RELAP5-3D, MELCOR, NEWT
21 or post-processing in MATLAB or Python.

Advanced knowledge of fluid dynamics, heat transfer, thermodynamics, or other reactor plant and reactor physics related subjects.

Experience with large/complex systems including fluids, heat transfer, instrumentation and control systems, and electrical components.

Strong written and verbal communications skills with an ability to articulate technical ideas in a clear and concise manner.

Detail oriented approach to technical work with emphasis on organized methods and thorough documentation.

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 $95,700.00 - $ 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…

Position Requirements

10+ Years work experience
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