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Mechanical System Design Engineer; Lynchburg, VA,

Job in Lynchburg, Campbell County, Virginia, 24501, USA
Listing for: BWX Technologies Inc.
Full Time position
Listed on 2026-06-03
Job specializations:
  • Engineering
    Mechanical Engineer, Systems Engineer
Job Description & How to Apply Below
Position: Mechanical System Design Engineer (Lynchburg, VA, US)
At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. A U.S.

-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering innovator that provides safe and effective nuclear solutions for global security, clean energy, environmental restoration, nuclear medicine and space exploration. With more than 7,800 employees, BWXT has 14 major operating sites in the U.S., Canada and the U.K. We are the sole manufacturer of naval nuclear reactors for U.S. submarines and aircraft carriers.

Our company supplies precision manufactured components, services and fuel for the commercial nuclear power industry across four continents. Our joint ventures provide environmental restoration and operations management at a dozen U.S. Department of Energy and NASA facilities. BWXT's technology is driving advances in medical radioisotope production in North America and microreactors for various defense and space applications. For more information, visit  Follow us on Linked In, X, Facebook and Instagram.

Welcome to BWXT

We believe in empowering our employees and cultivating a dynamic workplace that fosters growth and collaboration. Whether you're an experienced professional or just starting your career, you'll find opportunities to challenge yourself, learn from seasoned experts, and contribute to nuclear innovation. We required a diverse range of skills to support our work in the markets that drive our business and welcome candidates from all backgrounds and life stages who are passionate about making a difference.

BWXT is People Strong, Innovation Driven - be part of BWXT's innovation hub. BWXT's Advanced (Use the "Apply for this Job" box below). researches, designs, and develops innovative new nuclear reactors, nuclear rocket propulsion systems, and radioisotope production systems for both internal and external customers.

If you are looking for a career where your experience is valued, innovative thinking is fostered, and barrier-free teamwork is embraced every day, then this opportunity is for you.

Position Overview:

BWXT Advanced Technologies is seeking a Mechanical System Design Engineer. This position is focused on system design, not detailed component design, and will report administratively to the Mechanical System Design Supervisor. The System Design Engineering group supports programs for internal and external customers across Advanced Manufacturing, Medical Radioisotopes, and Nuclear Reactor Design.

Location:

This position is based on-site in Lynchburg, VA at the Advanced Technologies Office.

Your Day to Day as a Mechanical System Design Engineer:

* Identify relevant system requirements and interface requirements then prepare appropriate system design documentation such as system design descriptions and control narratives.

* Select components (e.g., valves, heat exchangers), perform calculations, and prepare specifications for their detailed design and procurement.

* Design piping systems including line sizing and pressure drop calculations.

* Lead the creation of appropriate output documentation such as process flow diagrams, P&IDs, component data sheets and system test request documentation.

* Utilize appropriate regulations, design codes and standards (e.g., ASME) for fluid systems.

* Coordinate with other interfacing disciplines such as systems engineers, electrical engineers, I&C engineers, mechanical equipment designers, and test engineers.

* Prepare and present system design results to internal and external stakeholders.

Required Qualifications:

* A bachelor's degree in engineering (mechanical, nuclear, or similar discipline) or physics is required.

* A minimum of fifteen (15) years of related work experience is required.

* Must possess a technical background in engineering design, fluid systems, thermodynamics, and process instrumentation.

* Must be proficient with standard Microsoft Office applications.

* Must have excellent written and verbal communication skills.

* Must possess the ability to self-direct with minimal day-to-day supervision.

* Must be a U.S. citizen.

* Must be able to obtain and maintain a U.S. Department of Energy (DOE) or Department of Defense (DOD) security…
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