Top Mechanical Design Engineer Jobs in Los Angeles, CA

Design and integrate Power Conversion System hardware for advanced nuclear microreactors, including pressure boundaries, piping, supports, rotating machinery interfaces, thermal-growth accommodations, and high-temperature components. Own mechanical arrangement and pressure budgets, produce fabrication-ready designs, support testing and instrumentation, and use test data to improve performance and component life. Collaborate across mechanical, electrical, safety, and nuclear teams while supporting manufacturing, assembly, commissioning, and troubleshooting.

Own the mechanical design and lifecycle development of spacecraft electric propulsion hardware, including propulsion modules, thruster components, propellant systems, avionics boxes, structures, and tanks. Create models, drawings, and interface documents; conduct analysis; develop and execute tests; iterate prototypes; qualify flight hardware; manage suppliers; and support production, integration, and in-space demonstrations.

The Design Engineer - Mechanical Systems designs, develops, and verifies helicopter mechanical systems, ensuring safety, weight, and cost objectives are met.

Design hardware for a propulsion system, own mechanical designs, manage vendors, validate designs, and conduct testing for satellite propulsion.

Lead mechanical process design for water and wastewater projects: develop basis of design, equipment sizing/selection, construction documents, specifications, hydraulic analyses, cost estimates, discipline coordination, project management, business development, mentoring, and quality control.

Design custom industrial machinery, automation equipment, robotic tooling, fixtures, and mechanical systems from concept through commissioning. Create CAD models, manufacturing drawings, bills of materials, and engineering documentation using GD&T and design-for-manufacturing principles. Support fabrication, machining, welding, assembly, prototyping, testing, troubleshooting, and continuous improvement while collaborating with manufacturing, controls, suppliers, project management, and technicians.

Design, prototype, analyze, and test aerospace rocket and missile structures, mechanisms, electromechanical hardware, and vehicle components. Own products from concept through integrated testing and manufacturing, perform hand calculations and computational analysis, optimize designs for harsh environmental and dynamic conditions, iterate manufacturing and testing processes, and lead reviews and trade studies with internal teams, suppliers, and customers.

The Senior Mechanical Design Engineer designs space-rated mechanisms, prototypes, and testing, ensuring functionality, performance, and manufacturability in a fast-paced startup environment.

Design and own primary and secondary structures, mechanisms, and fluid systems for SpaceX’s Starfall re-entry vehicle. Perform hand calculations, FEA, and CAD to validate hardware, lead design reviews and qualifications, coordinate with suppliers and internal teams, and manage hardware through design, fabrication, testing, launch, and reuse.

Design, develop, test, and qualify high-performance propulsion components for Starship/Super Heavy. Own component architecture, drawings, testing (shock, vibration, thermal, pressure), manufacturing integration, root-cause analysis, and cross-functional coordination to accelerate production and ensure flight readiness.

Lead end-to-end design, analysis, testing, and production of propulsion components for Starship/Super Heavy. Develop manufacturable flow-control and electromechanical devices, validate reliability through environmental testing, collaborate with manufacturing and systems teams, drive root-cause investigations, and ensure flight readiness and high production yield.

Collaborate on mechanical designs for data center systems, validating performance, overseeing construction, and ensuring designs meet quality benchmarks.

Lead mechanical design, development, testing, and analysis for a high-power electric propulsion system. Define requirements, produce 3D models and drawings, execute test plans, manage vendors, iterate prototypes, and deliver qualified flight hardware through production and flight.

Design, develop, validate, and support certification of flight mechanisms (primary/secondary actuators, propulsion, landing gear, ECS). Lead subcomponent design (gears, bearings, seals), perform analysis and environmental qualification testing (DO-160G/MIL-STD-810), and collaborate with electrical and software teams from concept through fabrication and flight test.

Design and develop mechanical structures, mechanisms, tooling, fixtures, and RF feed/waveguide components for satellite ground stations. Collaborate with RF, electrical, and manufacturing teams to ensure manufacturability, reliability, and regulatory compliance, participate in design reviews, and support transition from concept to production.

Lead mechanical engineering evaluations for data center opportunities, assessing HVAC, cooling, chiller, CRAH/CRAC, liquid cooling, and critical equipment systems. Conduct facility due diligence, validate capacity and design assumptions, evaluate vendors and deployment risks, and provide feasibility and Go/No-Go recommendations. Support mechanical design strategies, equipment selection, commissioning, and construction readiness while partnering with engineering teams, consultants, and vendors to establish scalable standards for hyperscale and AI infrastructure.

Design and own primary/secondary structures, mechanisms, and fluid systems for Falcon launch vehicles. Perform hand calculations, FEA, and CAD; lead design reviews; interface with suppliers/customers; manage hardware through design, assembly, launch and re-use.

Design and own primary/secondary structures, mechanisms, and fluid systems for a re-entry cargo vehicle. Perform hand calculations, FEA, and CAD; lead design reviews, qualify hardware, interface with suppliers and production, and support assembly, launch, and reuse.

The Mechanical Design Engineer will design, develop, and test mechanical components and machinery, applying engineering principles and knowledge.

The Senior Turbomachinery Mechanical Design Engineer will design and develop new turbomachinery, managing CAD models, conducting analyses, and collaborating across teams to ensure design efficacy from concept to production.

The Senior Systems Engineer will design and optimize clean energy power generation systems, focusing on mechanical and fluid dynamics, collaborating with team members and ensuring high performance and reliability.

The Mechanical Engineer focuses on leading spacecraft mechanical design, managing CAD development, and ensuring quality through collaboration with various teams. Responsibilities include overseeing designs, applying engineering principles, creating documentation, and mentoring others.

Lead end-to-end mechanical design for electromechanical production systems: translate requirements into manufacturable designs, perform FEA and hand calculations, prototype and validate, create drawings/BOMs, apply DFM/DFA, and mentor junior engineers while collaborating with electrical, controls, manufacturing, and suppliers.