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Mechanical System Design Engineer

Date: Sep 15, 2022

Location: Lynchburg, VA, US

Company: BWX Technologies

At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. Headquartered in Lynchburg, Va., BWXT provides safe and effective nuclear solutions for national security, clean energy, environmental remediation, nuclear medicine and space exploration. With approximately 6,400 employees, BWXT has 12 major operating sites in the U.S. and Canada. 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 remediation and nuclear operations management at more than 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. Follow us on Twitter at @BWXTech and learn more at



BWXT is currently seeking a Mechanical System Design Engineer for its Lynchburg, VA – Ramsey Place location!


The Advanced Technology (AT) group at BWXT designs and develops innovative new nuclear reactors, medical isotope solutions, and related systems for internal and external customers. BWXT is seeking an experienced Mechanical System Design Engineer for our Advanced Technology Programs office in Lynchburg, VA. The ideal candidate would have significant thermal fluid system design experience with a proven ability to design complex systems utilizing appropriate components and related production hardware verification experience. This position is focused on system design, not detailed component design, and will report administratively to the Manager of Systems Design Engineering. The Systems Design Engineering group supports programs for internal and external customers across Advanced Manufacturing, Medical Radioisotopes, and Nuclear Reactor Design.


Job Description/Duties:

  • 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 basic calculations, and prepare specifications for their detailed design.
  • 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 electrical engineers, I&C engineers, mechanical equipment designers, and test engineers.
  • Prepare and present system design results to internal and external stakeholders.


Job Qualifications/Requirements:

  • A Bachelor’s degree in Engineering (Mechanical, Nuclear or similar discipline) from an ABET-accredited university is required.
  • Must possess at least seven (7) years of related work experience.
  • Must possess a technical background in engineering design, fluid systems, thermodynamics, and process instrumentation.
  • Experience with MatLab, and/or MathCad is required.
  • Proficiency with standard Microsoft Office applications is required.
  • Excellent written and verbal communication skills is required.
  • Must possess the ability to self-direct with minimal day-to-day supervision.
  • Must be a US Citizen with no dual citizenship.
  • Must be able to obtain and maintain a U.S. Department of Energy (DOE) or Department of Defense (DOD) security clearance, whichever is required.


Additional Desired Skillsets:

  • 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, 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 organizations.
  • System modeling experience in Simulink and exposure to Sysml.
  • Familiarity with NRC and/or DOE requirements.
  • Knowledge and experience in the application of Systems Engineering principles.



As a federal government contractor, BWX Technologies, Inc. and any subsidiaries, affiliates and related entities (“BWXT” or the “Company”) complies with all federal, state, and local laws and customer requirements regarding COVID-19 and other health and safety protocols.  As such, all BWXT new hires will be required to adhere to applicable Company COVID-19 requirements within the workplace as a condition of employment.


Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified information or matter. Position requires U.S. citizenship with (no dual citizenship) ability to obtain and maintain a Department of Energy (DOE) security clearance which involves an extensive criminal and financial background investigation, drug test and previous employment reference verifications.


BWXT supports diversity and is committed to the concept of Equal Employment Opportunity. We have established procedures to ensure that all personnel actions such as recruitment, compensation, career development, benefits, company-sponsored training and social recreational programs are administered without regard to race, color, religion, gender, national origin, citizenship, age, disability or veteran status.


Nearest Major Market: Lynchburg
Nearest Secondary Market: Virginia

Job Segment: Thermal Engineering, Design Engineer, Nuclear Engineering, Defense, DoD, Engineering, Government