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Senior Mechanical Engineer - Clearance Required

Remote / Online - Candidates ideally in
Livermore, Alameda County, California, 94551, USA
Listing for: Lawrence Livermore National Laboratory
Remote/Work from Home position
Listed on 2026-03-07
Job specializations:
  • Engineering
    Mechanical Engineer, Systems Engineer
Salary/Wage Range or Industry Benchmark: 175530 - 267060 USD Yearly USD 175530.00 267060.00 YEAR
Job Description & How to Apply Below
Position: Senior Mechanical Engineer - Active Clearance Required

Company Description

Join us and make YOUR mark on the World!

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability.

Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.

Job Description

We have multiple openings for Senior Mechanical Engineers to participate in new and ongoing projects. We provide nuclear weapon engineering design expertise; systems engineering; experimental device design; fabrication and assembly; surveillance of nuclear stockpile components; engineering analysis and computational simulation; and engineering testing for evaluation and maintenance of the enduring and future nuclear weapon stockpile. Our engineers 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 Programs.

Depending on your assignment, this position 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
  • Provide technical expertise in mechanical and electromechanical design.
  • Conduct research in structural, thermal, hydraulic, or dynamics modeling of mechanical systems.
  • Produce advanced conceptual and detail designs in support of on-going projects.
  • Prepare supporting health and safety documentation that is aligned with the Integrated Safety Management (ISM) requirement and participate in design and Management Prestart Reviews.
  • Coordinate project interfaces and deployment interfacing with other organizations internal and external to the Laboratory.
  • Lead and/or provide guidance and technical direction to multidisciplinary project teams in a growing, dynamic environment.
  • Perform other duties as assigned.
Additional job responsibilities, at the SES.
4 level
  • Set broad project vision and strategy and influence technical direction for self and others.
  • Provide expert capability in highly complex mechanical design and analysis.
Qualifications
  • This position requires an active Department of Energy (DOE) Q-level clearance or active Top Secret clearance issued by another U.S. government agency at the time of hire.
  • Bachelor's degree in Mechanical Engineering or a related field, or the equivalent combination of education and related experience.
  • Advanced knowledge of mechanical design.
  • Significant experience in prototype development and testing, as well as hardware design and analysis.
  • Ability to devise solutions for unique and complex problems.
  • Ability and flexibility to reprioritize and change programmatic direction depending on emergent requests.
  • Significant experience in managing, overseeing, and delivering multiple projects on budget and schedule.
  • Ability to lead, manage, and mentor junior team members.
  • Advanced communication skills with proven ability to present concepts and ideas in a clear and coherent manner, both verbal and written for presentation and interaction with other technical staff members.
Additional qualifications at the SES.
4 level
  • Expertise in highly complex mechanical design and analysis and significant experience in project planning and highly complex technical leadership.
  • Significant experience developing and implementing creative solutions to a diverse range of highly complex problems and leading corrective actions where necessary.
  • Expert communication, facilitation, and collaboration skills necessary to present, explain, and advise senior management and/or external sponsors and proven record of team building and conflict resolution.
Qualifications We Desire
  • Master's degree or PhD in Mechanical Engineering or a related field.
  • Advanced knowledge of systems engineering principles and practices and their application.
Pay Range

$175,530 - $267,060 Annually

$175,530 - $222,564 Annually for SES.
3 Level

$210,630 - $267,060 Annually for SES.
4 Level

This is the lowest to highest salary in good faith we would pay for this role at the time of this posting. Pay will not be below any applicable local minimum wage. An employee's position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance,…

Position Requirements
10+ Years work experience
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