Precision/Mechanical Engineer

Security Clearance: Anticipated DOE Q clearance (requires U.S. citizenship and a federal background investigation) Drug Test: Required for external applicant(s) selected for this position (includes testing for use of marijuana), We have an opening for a Precision/Mechanical Engineer to join our Precision Systems & Manufacturing Group. You will apply precision and mechanical engineering principles to develop solutions to a wide variety of research and development projects. These efforts will include the design and implementation of hardware solutions to program-critical problems, development and execution of instrumentation and testing platforms used to validate technology advances, assessment and iteration of designs based on testing data, and other related engineering activities. You will be part of a multidisciplinary team responsible for delivering mission-critical capabilities for LLNL. You will become familiar with the ongoing priorities of the programs being supported and assist in developing proposals for future contributions to the success of program objectives. Projects may involve requirements that are beyond commercially available capabilities and solutions may require modifications to commercial tools or development of advanced tools, sensors, and fabrication methods. When available technology is inadequate to meet current or future program needs, forward thinking will be essential for envisioning directions for technology development. This position is in the Material Engineering Division (MED), within the Engineering Directorate.

This position requires full-time on-site presence due to the nature of the work.

This position will be filled at either level depending on your qualifications. Additional job responsibilities (outlined below) will be assigned if you are selected at the higher level.

In this role, you will

• Design and implement novel precision and mechanical hardware solutions and/or quantified enhancements for existing hardware by utilizing precision engineering approaches, engineering calculations and analysis, rigorous design documentation, and overseeing fabrication and implementation.
• Quantify design effectiveness through the development of prototypes and execution of testing and validation plans involving the integration of sensors and actuators, utilization of data acquisition equipment, evaluation of test data, and authoring and presenting reports of findings.
• Work under limited direction and collaboratively as part of a team to develop, implement, and qualify hardware solutions of moderate complexity, including setting design goals and constraints, in support of various research and programmatic applications.
• Develop and present technical approaches, project plans, and documentation to peers and program managers.
• Perform other duties as assigned.

Additional job responsibilities, at the SES.3 level

• Propose, implement, and guide precision and mechanical hardware solutions for hands-on laboratory R&D experiments that support Laboratory mission priorities.
• Provide technical leadership, mentorship, and project management for multidisciplinary teams of engineers, scientists, designers, and technicians.
• Use advanced knowledge and judgment to independently define technical objectives from evolving requirements, prioritize concurrent work, and allocate resources across complex design, testing, and validation efforts for precision, mechanical, and/or optomechanical systems.
• Lead formal and informal design reviews to develop and implement solutions for complex precision and mechanical hardware challenges, applying modeling and analysis tools and creative use of established techniques and methods.
• Collaborate to develop innovative precision and mechanical methods and technologies that enable project completion, advance organizational goals, and inform future technical approaches and proposal development.

• Ability to obtain and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
• Master’s degree in Precision Engineering, Mechanical Engineering, or the equivalent combination of education and related experience.
• Comprehensive knowledge and experience in the design, analysis, and fabrication of precision and mechanical components and assemblies, including proficiency in applying and interpreting specifications and technical drawings including ASME Y14.5 GD&T standards.
• Comprehensive knowledge and experience with material selection, manufacturing methods, or metrology for precision tooling and hardware.
• Comprehensive knowledge and experience in hardware integration and testing, including sensors, actuators, control systems, and data acquisition systems, with the ability to apply these to both new and existing processes/equipment.
• Proficient verbal and written communication, facilitation, and collaboration skills necessary to effectively collaborate in a team environment and present and explain technical information to management and/or external sponsors.
• Proficient interpersonal skills with an emphasis on developing relationships and building long-term collaborations with internal and/or external partners.

Additional qualifications at the SES.3 level

• Significant experience developing, designing, commissioning, validating, operating, and maintaining complex precision mechanical and/or optomechanical systems, including ensuring compatibility with interdependent systems, under minimal direction.
• Significant experience defining scope from ambiguous, evolving, and/or rapidly changing requirements, with demonstrated flexibility to reprioritize work and adjust programmatic direction in response to emerging needs.
• Advanced leadership skills and significant experience mentoring others, leading small technical teams, managing project scope and schedule, and developing research proposals.
• Advanced verbal and written communication skills, with the ability to collaborate effectively, clearly present and explain technical information, and advise management.

Qualifications We Desire

• Proficient in commercial software applications such as Matlab, Python, or Visual Basic.
• Working engineering knowledge associated with precision manufacturing.
• Experience in precision alignment of mechanical and/or optomechanical systems.
• Design for High Voltage, RF, and/or High Vacuum.
• Thermal management, including liquid cooling systems.
• Ruggedization of precision optomechanical assemblies.
• Experience contributing to multi-year engineering projects that require strong organizational skills, specifically in the management of requirements, schedules, milestones, results analysis, and technical reports.

$146,340 - $222,564 Annually

$146,340 - $185,544 Annually for the SES.2 level $175,530 - $222,564 Annually for the SES.3 level, * Included in 2026 Best Places to Work by Glassdoor!

• Flexible Benefits Package
• 401(k)
• Relocation Assistance
• Education Reimbursement Program
• Flexible schedules (*depending on project needs)
• Our values - visit https://www.llnl.gov/inclusion/our-values

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.