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Lawrence Livermore National Laboratory · 4 hours ago

Mechanical - Structural Analyst

Livermore, CA

Full-time

Onsite

Mid, Senior Level

$122K/yr - $186K/yr

Lawrence Livermore National Laboratory (LLNL) is seeking Mechanical/Structural Engineering Analysts to support its stockpile programs. The role involves performing computational modeling and simulation to evaluate structural and material responses, contributing to research and development in advanced simulation capabilities, and supporting the engineering design and certification of the nation’s nuclear weapon systems.

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No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

Contribute to the development of finite element analysis (FEA) models of mechanical components and contribute to the integration of the components into structural models at system level

Perform structural and/or thermal analyses using in-house codes for design, modification, optimization, testing, and certification of the nuclear weapon systems, in general technical guidance

Document and present (as appropriate) simulation and analysis results and technical approaches

Work with teams of analysts, code developers, engineers, and subject matter experts using established workflows, standards, and verification/validation best practices to solve technical problems under general direction

Support deliverables with occasional travel as needed

Perform other duties as assigned

Develop finite element analysis (FEA) models of nuclear weapon systems, perform rigorous FEA of the systems, make engineering judgments on the system performances, and provide engineering resolutions to technical issues under limited direction

Work independently and with teams using established workflows, standards, and verification/validation best practices to solve moderately complex technical problems under limited direction

Participate in formal and informal design reviews as required

Develop engineering analysis capability enhancements to achieve project deliverables, which may include contributing to FEA codes and pre-/post-processing systems

Qualification

Finite Element Analysis (FEA)Solid MechanicsComputational ModelingCommercial FEA ToolsContinuum MechanicsThermal AnalysisProgramming PythonProgramming MATLABVerbal CommunicationWritten CommunicationTeam CollaborationProblem SolvingOrganizational Skills

Required

Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship

Masters degree in mechanical, structural, or aerospace engineering, or structural/applied mechanics, or related field, or the equivalent combination of education and related experience

Experience with commercial FEA tools (LS-DYNA, ABAQUS, ANSYS, ADINA or similar), or NNSA national laboratory codes (ParaDyn, Diablo, Sierra, or similar)

Fundamental knowledge of continuum mechanics (or advanced solid mechanics) and the finite element method

Ability to work under general direction and use independent judgment to determine analysis methods and evaluation criteria while working independently or as part of a team within the assigned project group

Proficient verbal and written communication skills necessary to effectively collaborate in a team environment and present and explain technical information

Ability to travel occasionally

Preferred

Comprehensive knowledge in one or more technical areas: mechanical behavior of materials, structural mechanics, failure mechanics, dynamics, modal response, heat transfer, hydrodynamics, or thermo-mechanical response, and the ability to work independently as well as part of a team across multiple organizations at the Laboratory

Experience in developing solutions to moderately complex technical challenges to enable forward progress, and comprehensive knowledge of elasticity, plasticity, failure, heat transfer, material science, engineering material performance, and properties of materials

Effective communication and organizational skills necessary to perform duties and specific experience performing static structural, thermal, thermal-mechanical, dynamic, or hydrodynamic analysis through FEA

Experience with finite element meshing software to develop high quality hexahedral based meshes that are sufficient for the selected analysis approach

Programming experience, particularly in Python and/or MATLAB, and familiarity with Git version control environments

Experience with commercial FEA codes such as Abaqus, Ansys, LS-Dyna, Nastran, CTH, or similar; or with NNSA national laboratory codes such as ParaDyn, Nike3D, Dyna3D, Diablo, Sierra, ALE3D, or similar

Experience with the calibration and benchmarking of material models on empirical test data and working knowledge in experimental techniques and verification/validation practices

Familiarity with FEA and Computational Mechanics Theory and practice, including nonlinear solid mechanics, heat transfer and material modeling