Aerothermal/Trajectory Analyst

We have an opening for an Aerothermal and Trajectory Analyst in support of hypersonics and reentry systems under the Flight Performance Integration (FPI) program. Activities include modeling and simulation of hypersonic re-entry bodies, early feasibility studies, flight testing, and software development. You will develop engineering solutions for aerodynamics and aerothermal analysis in support of these programs, from systems requirements trade studies through algorithm design and hardware integration, including test data analyses. This position is in the Computational Engineering Division (CED), within the Engineering Directorate. 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 Provide aerospace engineering support for the enduring and future weapons stockpile (both conventional and nuclear) assisting with aerodynamic, aerothermal/ablation, mechanical, and/or trajectory analyses; associated post-processing; and presentation/documentation of results, while adhering to defined practices and procedures. Participate, collaborate, and contribute to the development of computational models, and provide support to teams performing analyses and research and development activities in advanced simulation capabilities that utilize state of the art computational techniques and leverage high performance supercomputers. Utilize comprehensive engineering knowledge and defined practices and procedures to contribute to the development of models of weapon systems and assist teams with geometry and mesh creation, application of appropriate material models and properties, and evaluation of relevant flight conditions. Participate in the reporting of technical approaches and publishing activities as appropriate. Contribute to analyses that support or guide design, testing, modification, and optimization of mechanical components and systems. Participate in formal design reviews and informal peer reviews as required. Support integration and data flow between analysis tools. Work closely with a team of analysts, code developers, statisticians, engineers, and subject matter experts to solve problems of limited complexity, evaluating readily identifiable factors and using standard techniques and methodologies. Contribute to the fulfillment of technical projects and organizational objectives, collaborate with team members to provide input on deliverables, and regularly communicate the status and projected delivery date to ensure quality results are provided in accordance with established deadlines. Support programmatic deliverables with occasional travel, as necessary. Perform other duties as assigned. Additional job responsibilities at the SES.3 level . Utilize advanced engineering knowledge and broad technical concepts and techniques to contribute to the development of models of weapon systems through geometry and mesh creation, selection or development of appropriate material models and properties, and determination of relevant flight conditions. Collaborate with teams to prepare reports on technical approaches and publish as appropriate. Work independently, as well as in conjunction with team members, to participate in the development and implementation of analysis workflow and quality practices, including workflow optimization, process standardization, configuration management of analysis files and software, and verification and validation and uncertainty quantification (VVUQ) of models. Contribute to program vision and strategy by providing input on technical issues, recommending improvements, new ideas, and/or modifications, and exploring a variety of approaches to support direction and decisions made by self, team, management and/or external customers. Use independent judgment to provide solutions to problems of moderate complexity, using a variety of approaches within generally established methods. May mentor and provide guidance to junior staff analysts. Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship. Bachelor’s degree in Mechanical or Aerospace Engineering or related technical discipline, or the equivalent combination of education and related experience. Comprehensive knowledge of flight dynamics, aerothermodynamics, heat transfer, and ablation in reentry environments. Comprehensive level skills and experience, and knowledge of concepts in (1) trajectory modeling software such as: GPOPS-II, OTIS, POST, TAOS, or similar, (2) hypersonic computational fluid dynamics (CFD) software, including pre- and post-processing utilities, such as Pointwise, Ansys, Cart3D, US3D, SPARC, Tecplot, Paraview, or similar, (3) one or more of the following aerothermal response codes: FIAT, ATAC, CMA, Aria, or similar, and (4) experience in developing and using Python code. Comprehensive level skills in the development of relevant principles, theories, concepts, and techniques in the solution of engineering problems of limited complexity. Proficient verbal and written communication skills needed to effectively collaborate in a team environment, present and explain technical information, and document work. Ability to work independently and as a member of a multidisciplinary team. Ability to travel. Additional qualifications at the SES.3 Advanced knowledge of and relevant project experience analyzing flight dynamics, aerothermodynamics, heat transfer, ablation in reentry environments, and Fluid-Thermal-Structural Mod/Sim. Advanced level knowledge, skills, and experience in Bayesian VVUQ, the development of relevant principles, theories, concepts, and techniques in the identification, definition, and solution of moderately complex engineering problems. Ability to exercise independent judgment in determining optimal techniques, methods, and evaluation criteria for answering engineering questions and providing input on technical issues for specific projects. Experience participating and leading formal and informal design reviews. Advanced organizational, verbal, and written communication skills necessary to effectively collaborate with a multidisciplinary research team, interact with management, document executed work, and present and explain technical information. Qualifications We Desire PhD in Mechanical or Aerospace Engineering, or related field. Experience in one or more of the following areas: uncertainty quantification; statistics; mechanical design codes such as ProE/Creo; finite element analysis codes (i.e. ABAQUS, ANSYS, LSDYNA, etc.); Multi disciplinary design, analysis & optimization (MADO); and/or technical management or business development. Experience in development of software in a version-controlled environment (e.g. git), including testing and documentation. Pay Range $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 This is the lowest to highest salary we in good faith believe 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. #LI-Hybrid 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! 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