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Mechanical Engineer

Posted March 02, 2026
Full-time Entry Level

Job Overview

We have multiple openings for Mechanical Engineers to participate in new and ongoing projects. We provide nuclear weapon engineering design expertise; systems engineering; experimental device design; shock & vibration and thermal testing; fabrication and assembly; and assessment of nuclear stockpile components for evaluation and maintenance of the enduring and future nuclear weapon stockpile. You will interface with colleagues at other National Laboratories and Production Agencies, National Nuclear Security Administration (NNSA), and Department of Defense (DoD) and their contractors. These positions are in the Defense Technologies Engineering Division (DTED), within the Engineering Directorate. DTED provides support to Strategic Deterrence (SD) Programs.

Depending on your assignment, these positions may offer a hybrid schedule, blending in-person and virtual presence. You may have the flexibility to work from home one or more days per week. 

These positions will be filled at either level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level. 

You will

  • Derive engineering requirements, develop conceptual designs, and perform supporting assessment of mechanical systems, test prototypes, and associated diagnostics.
  • Assist and support the detail design process, component part fabrication, and unit assembly.
  • Prepare supporting safety and engineering documentation and participate in engineering design reviews.
  • Participate in engineering testing operations, analyze results, and write reports.
  • Generate detailed plans, schedules, and budgets for project activities.
  • Interface with other organizations internal and external to the Laboratory to complete various projects.
  • Work independently as well as a part of a multidisciplinary team.
  • Perform other duties as assigned.

Additional job responsibilities, at the SES.2 level 

  • Provide comprehensive engineering knowledge to resolve technical and programmatic issues, using the broad application of technical concepts and techniques.
  • Perform independent technical tasks to provide solutions for a diverse range of moderate to complex issues that require the creative use of established or innovative methods.
  • Select methods, techniques, and evaluation criteria to obtain results based on analysis of multiple, largely identifiable factors.
  • May represent the organization by providing input on technical issues for specific projects.
  • May provide guidance and/or informal mentoring to less-experienced team members.

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