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Mechanical Engineer (Principal)

Naval Nuclear Laboratory
parental leave, tuition assistance, 401(k)
United States, South Carolina, Charleston
Feb 10, 2026
About Us

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

Join the Site Projects (SP) team as a Principal Facility Projects Engineer in the Moored Training Ship Directorate/Site Projects, Planning, and Engineering (SPPE) Subdivision supporting the planning, design, and execution of Naval Nuclear Propulsion Program (NNPP) major facility construction projects. SP is the Naval Reactors (NR) program lead for major facility construction projects in Charleston, SC. This is an exciting opportunity to interact with various industries and stakeholders inside and outside the NNPP, including coordination of NNPP support of project deliverables and acting as the Program interface with outside Government entities, architecture/engineering (A/E) firms, and construction contractors.



Specific responsibilities include:



  • Serving as the NNPP interface with the architecture/engineering (A/E) firms, construction contractors, and Government agencies designing and executing major construction projects
  • Routinely reporting project status to Naval Nuclear Laboratory (NNL) and Naval Reactors (NR) personnel
  • Generating functional requirements and obtaining stakeholder approvals
  • Ensuring functional requirements are incorporated during project design reviews
  • Performing Quality Assurance for a wide range of disciplines (civil / structural, electrical, architectural, mechanical) and deliverables (design reviews, construction submittal reviews, field surveys, and closeout inspections)
  • Supporting efficient construction problem resolution and reviews/approvals of technical changes
  • Verifying accuracy and completeness of as-built drawings and other records

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 9 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 7 years of relevant experience;
or Doctorate degree from an accredited college or university in a related technical, engineering, science field and a minimum of 3 years of relevant experience;
or Currently a Principal Reactor Training Engineer, Refueling Engineer, or Field (RPCO) Engineer at the Company.

Preferred Skills

  • Experience leading multi-disciplinary teams to complete all assigned tasks
  • Ability to read and interpret construction contract documents (specifications, drawings, and cost estimates)
  • Experience with either civil / structural or electrical power/communications system design or construction
  • Demonstrated ability to interface and communicate (both written and verbal) with other departments, the Navy, and Naval Reactor (NR)
  • Familiarity with prototype and / or site operations at Nuclear Power Training Unit (NPTU) Charleston

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
$105,200.00 - $164,400.00 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 and vendor locations. For nearly 70 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 nation's 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.

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