Mechanical Engineer Pulsed Power Systems

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 an opening for a Mechanical Engineer to support the Advanced Sources and Detectors (ASD) Scorpius program, a first-of-a-kind linear accelerator advancing national security science. ASD Scorpius is being executed on behalf of the Department of Energy (DOE) National Nuclear Security Administration (NNSA) through a multi-institution collaboration involving Lawrence Livermore National Laboratory (LLNL), Los Alamos National Laboratory (LANL), and the Nevada National Security Site (NNSS).You will contribute to the design, development, and assembly of mechanical systems supporting high-energy pulsed power and accelerator technologies. This includes supporting the development and integration of solid-state pulsed power (SSPP) subsystems, as well as high-voltage infrastructure and diagnostic systems critical to accelerator performance. You will perform hands-on engineering across the full lifecycle—from concept development and detailed design through fabrication, assembly, integration, and testing. You will work closely with multidisciplinary teams across institutions to develop robust hardware solutions and support system integration efforts, contributing to the successful delivery of a complex, first-of-its-kind national security capability. This position is in the National Security Engineering Division (NSED), 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 based on knowledge and related experience as assessed by the hiring team. Additional responsibilities will be assigned if hired at the higher level. In this role, you will Design, develop, and support fabrication of mechanical components and assemblies for pulsed power and linear accelerator systems. Support assembly and integration of high-voltage subsystems, including cable routing, structural supports, and diagnostic hardware. Develop and refine mechanical designs for oil-filled systems, manifolds, and insulating structures used in high-voltage environments. Conduct basic engineering analyses (e.g., structural, thermal, or FEA) to inform design decisions and improve system reliability. Collaborate with multidisciplinary teams to integrate mechanical systems with electrical, diagnostic, and control subsystems. Support testing, troubleshooting, and commissioning of hardware, including participation in experimental setup and data collection. Document designs, procedures, and test results; communicate findings through technical reports and presentations. Follow safety, quality, and operational procedures in a highly regulated environment. Perform other duties as assigned. Additional job responsibilities, at the SES.2 level Independently develop and implement moderately complex mechanical designs for pulsed power and accelerator subsystems. Lead discrete tasks or small projects, including planning, execution, and coordination with cross-functional teams. Apply engineering judgment to evaluate design trade-offs and recommend improvements to system performance and manufacturability. Contribute to development of new design approaches, tooling, or processes that enhance efficiency, reliability, or throughput. Provide informal mentoring or technical guidance to junior staff, interns, or technicians. Qualifications Ability to secure and maintain a

U.S. DOE

Q-level security clearance which requires U.S. citizenship. Bachelor's degree in Mechanical Engineering or related field, or equivalent level of demonstrated knowledge. Fundamental knowledge of mechanical engineering principles, including design, materials, and manufacturing processes. Experience with CAD software (e.g., SolidWorks, Creo) for part and assembly design. Fundamental knowledge and hands-on experience with mechanical fabrication, assembly, or laboratory/test environments. Familiarity with basic engineering analysis methods (e.g., FEA, structural or thermal analysis). Sufficient verbal and written communication skills to collaborate effectively within a multidisciplinary team and document technical work. Ability to work under general direction and follow established engineering processes and procedures. Additional qualifications at the SES.2 level Demonstrated ability to apply broad mechanical engineering principles to solve moderately complex technical problems. Comprehensive experience independently executing design, fabrication, or integration tasks in a laboratory, manufacturing, or R&D environment. Experience contributing to system-level integration, testing, or troubleshooting of engineering hardware. Ability to exercise independent judgment in selecting methods, techniques, and evaluation criteria within defined objectives. Qualifications We Desire Experience with pulsed power systems, high-voltage hardware, or accelerator technologies. Experience designing or supporting oil-filled systems, high-voltage insulation, or dielectric materials. Familiarity with cable design, routing, or high-voltage interconnect systems. Experience with machine shop tools, fabrication techniques, or fixture/jig design. Exposure to multidisciplinary R&D environments involving rapid prototyping and testing. Pay Range $121,830

• $185,544 Annually $121,830
• $154,500 Annually for the SES.1 level $146,340
• $185,544 Annually for the SES.

2 level This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. 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, and business or organizational needs. Additional Information #LI-Onsite Position Information This is a Career Indefinite position, open to Lab employees and external candidates. Why Lawrence Livermore National Laboratory? 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 Security Clearance This position requires a Department of Energy (DOE) Q-level clearance. If you are selected, we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing. Q-level clearance requires U.S. citizenship. Pre-Employment Drug Test External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor. Wireless and Medical Devices Per the Department of Energy (DOE), Lawrence Livermore National Laboratory must meet certain restrictions with the use and/or possession of mobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area where you are not permitted to have a personal and/or laboratory mobile device in your possession. This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices. If you use a medical device, which pairs with a mobile device, you must still follow the rules concerning the mobile device in individual sections within Limited Areas. Sensitive Compartmented Information Facilities require separate approval. Hearing aids without wireless capabilities or wireless that has been disabled are allowed in Limited Areas, Secure Space and Transit/Buffer Space within buildings. How to identify fake job advertisements Please be aware of recruitment scams where people or entities are misusing the name of Lawrence Livermore National Laboratory (LLNL) to post fake job advertisements. LLNL never extends an offer without a personal interview and will never charge a fee for joining our company. All current job openings are displayed on the Career Page under "Find Your Job" of our website. If you have encountered a job posting or have been approached with a job offer that you suspect may be fraudulent, we strongly recommend you do not respond. To learn more about recruitment scams: https://www.llnl.gov/sites/www/files/2023-05/LLNL-Job-Fraud-Statement-Updated-4.26.23.pdf Equal Employment Opportunity We are an equal opportunity employer that is committed to providing all with a work environment free of discrimination and harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, marital status, national origin, ancestry, sex, sexual orientation, gender identity, disability, medical condition, pregnancy, protected veteran status, age, citizenship, or any other characteristic protected by applicable laws. Reasonable Accommodation Our goal is to create an accessible and inclusive experience for all candidates applying and interviewing at the Laboratory. If you need a reasonable accommodation during the application or the recruiting process, please use our online form to submit a request. California Privacy Notice The California Consumer Privacy Act (CCPA) grants privacy rights to all California residents. The law also entitles job applicants, employees, and non-employee workers to be notified of what personal information LLNL collects and for what purpose. The Employee Privacy Notice can be accessed here.