Principal Mechanical Engineer

Principal Mechanical Engineer Naval Nuclear Laboratory parental leave, tuition assistance, 401(k) Apr 16, 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 Did you know that every U.S. Navy Sailor in the Naval Nuclear Propulsion Program is certified on an operating nuclear prototype before deployment to the fleet? The Naval Nuclear Laboratory's Kenneth A. Kesselring Site proudly supports the U.S. Navy by operating one of the nuclear prototype training sites to qualify Sailors and test new technologies. Over 50,000 Sailors have trained at Kesselring since the beginning of operations in 1955!

About Us:

Located in Ballston Spa, York, the Kenneth A. Kesselring Site's Facilities Engineering organization is dedicated to maintaining and enhancing facility infrastructure critical to our mission. We are seeking an experienced Mechanical Engineer to join our team and contribute to our ongoing success.

Role Overview:

As a Mechanical Engineer with us, you will play a key role in supporting the design, maintenance program, and optimization of mechanical systems crucial to sustaining Navy training operations and a professional work environment for the approximately 2,000 people that call Kesselring home. Collaborating closely with on-site craft organizations, service subcontractors, and project managers, you will tackle diverse challenges, supporting both construction projects and ongoing site operations.

Responsibilities:

Provide expertise in engineering and operating mechanical building systems such as HVAC, pressure systems, plumbing, and radiological ventilation. Support efforts in planning, designing, and overseeing the maintenance and alteration of system equipment and facilities. Troubleshoot technical issues, develop specifications, and provide engineering solutions. Support project scoping, design reviews, construction oversight, and commissioning. Manage facility equipment operations, maintenance, repair, and construction activities. Evaluate current systems and propose engineering solutions to enhance reliability, performance, and efficiency. Coordinate with internal teams (Maintenance, Facility Operations, Security, Safety) and external vendors. 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 in engineering design, troubleshooting, or repair Knowledge of York State Mechanical Code and ASHRAE Fundamentals Proficiency in developing engineering documents and reviewing technical drawings Familiarity with verification and acceptance testing for facilities projects 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 $106,200.00 - $166,000.00 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. Apply Now