Senior Systems Engineer

Senior Systems Engineer Lawrence Livermore National Laboratory tuition reimbursement, 401(k), relocation assistance, remote work United States, California, Livermore May 11, 2026 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 Systems Engineer to drive the adoption of Model-Based Systems Engineering (MBSE), digital requirements management, and related digital engineering practices across the Weapon Technologies and Engineering (WTE) Program within the Deterrence Capabilities Group. You will serve as a cross-functional product expert and trusted advisor, guiding engineers to adopt and maximize the value of digital engineering tools and processes, including discrete requirements management and model-based systems engineering. Collaborating with multidisciplinary teams, you will advance MBSE and other digital engineering practices, assist in shaping related business processes, deliver training, and act as a liaison between solution providers and end users to facilitate effective tool adoption and integration, advocate for digital engineering adoption and grow communities of practice. This position is in the Deterrence Capabilities Group (DCG) in the Defense Technologies Engineering Division (DTED), supporting the Weapon Technologies and Engineering (WTE) Program. This position may offer a hybrid schedule, which includes the flexibility to work from home up to one day per week, after a probationary period. The specifics of the hybrid schedule, including the exact number of days required in the office and virtual work options, may vary based on the needs of the team and the organization. This position 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 Serve as a key liaison between weapon systems engineers and digital solution providers, facilitating the adoption and integration of Nuclear Security Enterprise (NSE

• wide digital engineering solutions to establish a unified digital thread.

Support Strategic Deterrence (SD) in developing MBSE infrastructure and capabilities, including defining policies, improving processes, and delivering training in advanced digital engineering approaches. Mentor and train staff in requirements management and MBSE tools, techniques, and best practices, collaborating with DCG, System Engineering and Integration (SE&I), WTE, and SD Applications Program personnel. Contribute in the development of component and subsystem technical requirements, including but not limited to performance requirements identification, interface management, and traceability to verification activities. Collaborate with external agencies and partners on joint digital engineering initiatives and integration efforts. Advocate for the systems engineering discipline and the adoption of modern digital engineering tools and practices to advance WTE and SD program objectives. Ensure effective and timely communication of program risks and requirements to leadership, Influencing technical decisions through SE&I activities. Represent WTE, SD, and DTED at meetings, briefings, and committee activities, and perform special assignments as directed, both within and outside the Laboratory. Perform other duties as assigned. Additional job responsibilities, at the SES.3 level Apply advanced knowledge of MBSE, digital requirements management, and systems engineering practices to provide authoritative opinions and recommendations, influencing program and project direction to align with high-level strategic objectives for WTE and SD. Lead cross-organizational digital engineering initiatives, coordinating interfaces among weapon systems engineers, SE&I, WTE, SD, and external NSE partners, serving as the primary technical point of contact for selected MBSE and digital engineering efforts. Provide overall technical leadership, guidance, and direction to multidisciplinary teams in developing, deploying, and maturing MBSE models, digital threads, and requirements management approaches, including advancing state of the art practices and transitioning them into routine program use while balancing customer and partner priorities to meet program milestones. Shape and refine digital engineering business processes, governance, and standards across the WTE Program, advising leadership on strategy, investment priorities, and integration of MBSE and requirements management capabilities into broader program workflows. Mentor, advise, and provide guidance to junior and mid-career staff on MBSE methods, digital engineering tools, and systems engineering best practices, fostering communities of practice and promoting a culture of effective digital engineering adoption. Qualifications Ability to obtain and maintain a

U.S. DOE

Q-level security clearance which requires U.S. Citizenship. Bachelor's degree in engineering, computer science, or related field, or the equivalent combination of education and related experience. Experience with systems engineering practices understanding and broad application of MBSE tools and techniques, including hands-on experience developing and maintaining system models. Comprehensive knowledge of discrete requirements management tools and other systems engineering tools and techniques for product realization processes, including requirements, designs, functions, failure mechanisms, risks, assessments, and verifications. Experience with systems engineering tools and techniques, product realization processes, project work planning, scheduling, cost estimating, analyzing and managing budgets, and project controls reporting. Ability to promote and maintain productive relationships across directorates, with other laboratories, and with personnel from external entities. Ability to work independently with minimal direction and use independent judgement in determining systems engineering methods and techniques. Proficient communication, facilitation, and collaboration skills, necessary to present and explain technical information. Experience working independently and responsively to changing priorities and ability to meet deadlines. Additional qualifications at the SES.3 level Advanced experience leading the application of MBSE and digital requirements management in complex, multidisciplinary engineering programs, including defining modeling strategies, guiding model architecture, and assuring integration with broader digital engineering ecosystems. Demonstrated ability to set technical direction for systems engineering and digital engineering activities across multiple projects or program elements, including establishing standards, workflows, and best practices for MBSE, requirements management, and digital thread development. Proven track record of leading cross-organizational collaborations, influencing stakeholders at multiple levels, and building consensus among diverse technical teams, sponsors, and external partners within the NSE or comparable environments. Significant experience mentoring and developing staff in systems engineering and MBSE practices, including training others to use digital engineering tools effectively and fostering communities of practice that improve organizational capability. Ability to be recognized as a resource in systems engineering and MBSE, with a demonstrated ability to provide strategic technical guidance to program and line management, contribute to long-range planning, and identify and drive opportunities for innovation in digital engineering. Qualifications We Desire Master's degree in engineering, computer science, or related field. Broad knowledge of Laboratory policies and practices and applicable NNSA orders. Subject matter knowledge of nuclear warhead engineering, assessments, and design. Pay Range $146,340

• $222,564 Annually $146,340
• $185,544 Annually for SES.2 Level $175,530
• $222,564 Annually for SES.

3 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, and business or organizational needs. Additional Information #LI-Hybrid Position Information This is a Career Indefinite position, open to Lab employees and external candidates. Why Lawrence Livermore National Laboratory? Included in 2026Best Places to Work by Glassdoor! FlexibleBenefits Package 401(k) Relocation Assistance Education Reimbursement Program Flexible schedules (

• depending on project needs) Our values
• visithttps://www.

llnl.gov/inclusion/our-values Security Clearance This position requires a Department of Energy (DOE) Q-level clearance.

If you are selected, wewill initiate a Federal background investigation to determine if youmeet 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 useand/or possession ofmobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area whereyou are not permitted to have a personal and/or laboratory mobile devicein your possession. This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices. Ifyou useamedical device, whichpairs with a mobile device,you must still follow the rules concerningthe mobile device in individual sections within Limited Areas. Sensitive Compartmented Information Facilities requireseparate 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. Pre-Placement Medical Exam A job related pre-placement medical examination may be required. 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. CaliforniaPrivacy Notice The California Consumer Privacy Act (CCPA) grants privacy rights to all California residents. The law also entitlesjob 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.