Mechanical System Design Engineer

BWX Technologies, Inc.; Virginia (MN); On-site; USD 120,000 - 170,000; Full time

Job summary

BWX Technologies, Inc. is seeking a Mechanical System Design Engineer for an on-site role in Lynchburg, VA. The position supports BWXT Advanced Technologies with system design across manufacturing, medical radioisotopes, and nuclear reactor design.

The role focuses on system design, documentation, and compliance with applicable design codes, coordinating with multiple engineering disciplines and stakeholders to deliver robust solutions. A bachelor’s degree and 15+ years of experience, U.S.

Qualifications

• Bachelor's degree in engineering (mechanical, nuclear, or similar) or physics.
• 15+ years of related work experience.
• Technical background in engineering design, fluid systems, thermodynamics, and process instrumentation.
• Proficiency with Microsoft Office applications.
• Excellent written and verbal communication skills.
• Ability to self-direct with minimal day-to-day supervision.
• U.S. citizen.
• Ability to obtain and maintain a DOE or DOD security clearance.

Responsibilities

• Identify system requirements and prepare system design documentation.
• Select components and prepare specifications for detailed design and procurement.
• Design piping systems including line sizing and pressure drop calculations.
• Lead creation of output documentation (P&IDs, data sheets, test docs).
• Use regulations and standards (e.g., ASME) for fluid systems.
• Coordinate with systems, electrical, I&C, mechanical equipment designers, and test engineers.
• Prepare and present system design results to stakeholders.

Skills

MS Office

Written & verbal communication

Self-direction

US citizenship

Education

Bachelor's degree in engineering or physics

Tools

SolidWorks

AutoCAD

AFT Arrow/Fathom

FlowMaster

Flownex

Python

Fortran

Visual Basic

Job description

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 www.bwxt.com. Follow us on LinkedIn (https://www.linkedin.com/company/bwx-technologies/mycompany/?viewAsMember=true), X (https://twitter.com/BWXT), Facebook (https://www.facebook.com/BWXTech) and Instagram (https://www.instagram.com/bwxtechnologies/).

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 Technologies (AT) group 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 clearance, whichever is required.

Preferred Qualifications

• Experience with the design and/or operation of thermo-mechanical fluid systems for nuclear applications.
• Experience with fluid system design and modeling software, such as AFT Arrow/Fathom, FlowMaster, Flownex, or comparable tools.
• Experience with CAD packages, such as SolidWorks or AutoCAD.
• Programming experience with Python, C++, Fortran, Visual Basic, or similar.
• Experience with design verification including interface with component vendors and test engineering organization.