Nuclear Safety Engineer

Associate | Full-time Engineering | Livermore, CA | 10/29/2026

Reference #: REF
9087QJob Code: SES.
2 Science & Engineering MTS 2 / SES.
3 Science & Engineering MTS 3

Organization:
Engineering Position Type:
Career Indefinite Security Clearance:
Active DOE Q clearance (or active Top Secret clearance)
Drug Test:
Required for external applicant(s) selected for this position (includes testing for use of marijuana)
Medical Exam: A job-related pre-placement medical examination may be 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 an opening for a nuclear weapon safety engineer to participate in new and ongoing programs. Nuclear weapon safety engineers are responsible for the design, assessment, and implementation of nuclear weapon safety components and subsystems. Our engineers interface with colleagues at other National Laboratories and Production Agencies, National Nuclear Security Administration (NNSA), and Department of War (DoW) 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. 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 Partner with system engineers, product realization teams, test engineers, analysts, and other stakeholders internal and external to LLNL to derive safety requirements, develop and mature conceptual designs, and perform supporting analyses and tests for demonstrating weapon safety requirements are met.

Conduct evaluations of components, subsystems, and system responses under normal and abnormal environments in support of stockpile stewardship, modernization programs, and future weapon system concepts.

Maintain awareness of design, development, production, maintenance, and dismantlement activities that affect weapon-system safety.

Prepare supporting safety and engineering documentation and participate in engineering design reviews.

Work independently as well as a part of a multidisciplinary team.

Travel to the other National Laboratories, the Production Agencies, NNSA locations, and DoW sites for meetings, briefings, and safety evaluations.

Perform other duties as assigned.

Additional job responsibilities, at the SES.
3 level Coordinate project interfaces and execution with organizations internal and external to the Laboratory.

Lead and provide guidance and technical direction to multidisciplinary project teams in a growing, dynamic environment.

Provide engineering knowledge to resolve complex technical and programmatic issues.

Perform independent technical tasks to provide solutions for complex issues.

Select methods, techniques, and evaluation criteria to obtain results based on analysis of multiple, largely identifiable factors.

Qualifications This position requires an active Department of Energy (DOE) Q-level clearance or…