Top Mechanical Engineering Jobs in Los Angeles, CA

Design, analyze, test, and support flight hardware for lunar rover structures, mechanisms, and thermal systems. Responsibilities include defining component requirements, selecting flight hardware, developing vehicle integration flows, and creating qualification and acceptance test plans. The engineer will collaborate across teams and external test facilities to validate mechanical subsystems under lunar operational constraints.

Design, develop, test, and operate planetary rovers and related mechanical hardware. Own products throughout their lifecycle, from requirements definition through mission operations. Create models, drawings, analyses, test plans, reports, certification documentation, and operations plans. Develop engineering tools and best practices while collaborating with leadership and mentoring junior engineers, contractors, and interns.

Lead mechanical and structures engineering for planetary rovers and related lunar hardware. Responsibilities include defining design, analysis, and test practices; architecting mechanical and thermal platforms; developing engineering tools; managing priorities through program phases; leading designs from start to finish; and mentoring junior engineers, contractors, and interns.

Serves as technical authority and team leader for space-based interceptor tooling and mechanical ground support equipment. Responsibilities include requirements, CAD design, fabrication, qualification, vendor management, safety and regulatory compliance, configuration control, root-cause investigations, budgets, schedules, and production support. Leads tooling engineers, chairs design reviews, and presents to program leadership, MDA offices, and government stakeholders. Designs fixtures, lifting devices, launch equipment, transportation containers, weldments, and integration tooling while ensuring compliance with defense and aerospace standards.

Contribute to the design, analysis, testing, integration, and validation of portable nuclear microreactors. The role owns engineering deliverables from concept through build, supports system-level testing and troubleshooting, collaborates across disciplines, and communicates results through design reviews, technical reports, and presentations. Candidates should have a mechanical or aerospace engineering degree, strong engineering fundamentals, hands-on design-and-build experience, and proficiency with CAD, analysis tools, and laboratory instrumentation.

Serves as the mechanical technical authority for ruggedized sensor systems, avionics, electronic hardware, and aerospace defense products. Leads mechanical architecture, CAD design, packaging, integration, structural and thermal analysis, prototyping, qualification, production transition, and sustainment. Resolves complex cross-disciplinary issues, manages interfaces and documentation, supports make-or-buy decisions, and mentors engineers. The role is onsite in El Segundo, California and requires the ability to obtain and maintain a U.S. security clearance.

Leads mechanical design, integration, analysis, qualification, and sustainment of ruggedized electronic hardware, sensor systems, avionics, structures, and mechanisms for aerospace and defense applications. Develops CAD models, drawings, documentation, architectures, and interface controls; supports prototyping, manufacturing transition, testing, troubleshooting, and fielded systems. Collaborates with multidisciplinary teams, customers, suppliers, and manufacturing partners while mentoring engineers and ensuring compliance with structural, thermal, environmental, and military requirements.

Design, build, test, and own precision mechanical structures and optomechanical systems for uranium enrichment technology. Responsibilities include material and coating selection, design optimization, qualification testing, alignment and beam stability testing, root-cause analysis, and cross-functional system integration. The role requires applying mechanical engineering fundamentals and materials expertise to hardware exposed to demanding thermal, chemical, optical, and mechanical conditions in a fast-paced environment.

Provides sustaining and project engineering support for theme park rides and attractions. Troubleshoots mechanical and structural issues, performs redesigns, manages design-to-installation projects, develops specifications and acceptance tests, oversees vendors and installations, and ensures compliance with safety standards and regulations. The role also coordinates cross-functional engineering activities, maintains technical documentation, reviews engineering changes, supports new attraction development, and mentors associate engineers.

Responsible for designing and developing tools and factory automation equipment to support manufacturing, collaborating with various teams for efficient production of rockets.

The role involves designing and developing tools and automation solutions for manufacturing rockets, collaborating with various teams to ensure successful project completion and integration.

The role involves designing and developing tooling and factory automation solutions for the manufacturing of rockets, with a focus on innovation and collaboration across engineering teams.

Develop innovative engineering solutions for rocket launch systems by interpreting requirements, designing CAD models, and analyzing performance.

Mechanical Engineering Interns support sustainable building design through CAD and Revit drafting, energy modeling, design calculations, HVAC and plumbing layouts, construction administration, commissioning, site visits, data analysis, specifications, cost estimates, and project coordination. The 10–12 week paid program provides hands-on experience with mechanical engineering and high-performance building projects.

Designs and documents mechanical building systems, including HVAC, plumbing, fire protection, and energy modeling. Performs mechanical calculations, thermal simulations, system layouts, and construction administration tasks under experienced project guidance. Uses Revit, AutoCAD, TRACE, and IES while developing knowledge of plans, building codes, specifications, and industry standards.

Owns the optical and opto-mechanical systems for Divergent’s laser powder bed fusion platform. Leads investigations, calibration, error budgeting, characterization, validation, and design improvements addressing optical performance, reliability, alignment, thermal drift, vibration, and contamination. Partners across software, controls, manufacturing, quality, service, suppliers, and process development to improve printer consistency and future architectures. The role includes hands-on assembly, alignment, testing, troubleshooting, technical leadership, standards development, and mentoring.

Leads mechanical engineering design for HVAC, plumbing, and fire protection systems in education and building projects. Responsibilities include technical calculations, specifications, code compliance, project planning, budgeting, scheduling, quality reviews, client collaboration, mentoring, multidisciplinary coordination, and construction administration. The role also supports energy-efficient design, identifies project risks, and oversees projects through bidding and construction.

Leads complex mechanical engineering design and project execution, including HVAC and plumbing systems for buildings. Provides technical leadership, consults with owners and contractors, mentors engineers, manages projects, supports business growth in healthcare, education, data center, and other markets, and ensures quality, compliance, and innovation.

The Mechanical Engineer will design mechanical systems for telescopes and collaborate with multidisciplinary teams, conducting simulations and supporting product lifecycle.

Designs, analyzes, tests, and supports manufacturing of Terran R primary and secondary flight structures. Responsibilities include developing structural load paths, sizing components, reviewing loads and material properties, releasing drawings, supporting hardware test campaigns, evaluating results, and improving manufacturability. The engineer owns designs from requirements through production using CAD and structural analysis tools, collaborates across teams, and leads projects to completion.

Design and develop mechanical systems, machine assemblies, fixtures, tooling, and robotic end-of-arm tooling using 3D CAD. Produce manufacturing drawings, BOMs, and documentation applying GD&T and DFM. Support fabrication, machining, welding, assembly, prototyping, testing, commissioning, troubleshooting, and continuous improvement while collaborating with cross-functional teams.

Designs, analyzes, builds, tests, and integrates spacecraft structures and mechanisms from concept through launch and orbital operations. Owns hardware roadmaps, structural and kinematic analyses, CAD designs, manufacturing drawings, testing, sourcing, fabrication, and continuous improvement. Collaborates with propulsion, electrical, software, controls, manufacturing, suppliers, and other stakeholders to mature hardware and validate system assumptions.

Designs and develops lightweight spacecraft systems, mechanisms, satellite bus configurations, and deployment systems. Owns component designs from concept through production, testing, and operation; performs hand calculations and FEA; creates CAD models, drawings, and procedures; leads design and test reviews; and manages schedules, vendors, budgets, and project deliverables. Supports proposals and mission concepts for civil, commercial, and defense space programs.

Owns mechanical design of autonomous precision munition airframes, mechanisms, payload packaging, thermal systems, and deployment hardware from concept through production. Leads structural analysis, FEA, environmental qualification, design-for-manufacture, and production release using composites, machined metals, and additive processes. Requires extensive defense or aerospace experience, strong CAD and GD&T expertise, and mentorship of mechanical engineers.

Lead and mentor manufacturing engineers in producing flight-ready mechanisms, coordinate cross-functional builds, and provide technical leadership in a rapidly evolving environment.