Top Mechanical Design Engineer Jobs in Los Angeles, CA

Designs and documents spacecraft payload mechanical structures and interiors using 3D CAD tools. Develops RF waveguide and cable routing, coordinates requirements across engineering groups, supports suppliers and manufacturing, assists with testing and production, and investigates anomalies and corrective actions. The role is fully onsite in El Segundo and requires U.S. Top Secret/SCI clearance eligibility and U.S. citizenship.

Design and develop mechanical systems, fixtures, enclosures, thermal solutions, and interfaces for space electronics test equipment. Create CAD models, manufacturing drawings, work instructions, BOMs, and release documentation. Perform structural, modal, thermal, and tolerance analyses; lead prototyping, fabrication, integration, testing, and troubleshooting. Collaborate with electrical engineers, support automated test system integration, evaluate vendors, and provide production and qualification support. The role is fully onsite in El Segundo, California, with up to 10% domestic travel.

Leads mechanical design and systems integration for aerospace turbomachinery, heat transfer products, and environmental control systems. Develops manufacturable designs using Siemens NX, Teamcenter, GD&T, tolerance analysis, materials knowledge, and manufacturing-process expertise. Coordinates priorities with customers, supports supplier and production issue resolution, advances digital product definition, improves design processes through automation and AI-enabled methods, and mentors less-experienced designers.

Leads mechanical design and systems integration for aerospace turbomachinery, heat transfer, and environmental control products. Provides technical expertise across product design definition, customer proposals, supplier and production issue resolution, design-for-manufacturability, cost reduction, and digital engineering process improvements. Mentors designers, advances automation and design standards, and supports multiple commercial and military aircraft projects.

The Lead Design Engineer is responsible for Mechanical Flight Controls, ensuring safety and compliance with FAA regulations, providing design solutions, and collaborating across teams for aircraft safety and performance.

Seeking a Senior Design Engineer for Mechanical Flight Controls, overseeing design solutions, compliance, and troubleshooting for aerospace projects.

Design and develop environmental control systems for aircraft. Responsibilities include creating and validating air and vapor cycle performance models, conducting thermodynamic, heat transfer, and fluid mechanics analyses, defining system requirements, optimizing system models, documenting results, integrating hardware and software, and performing system verification, validation, and testing. The role collaborates with cross-functional engineering teams to deliver reliable, compliant aerospace solutions.

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.

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.

Design, analyze, document, and test mechanical components and systems for advanced nuclear reactor projects. Develop SolidWorks designs and manufacturing drawings, prepare specifications and test procedures, coordinate with multidisciplinary engineering teams, support fabrication and testing, troubleshoot issues, and participate in customer technical discussions. The role requires hands-on problem-solving, cross-functional collaboration, and adaptability to evolving requirements.

Design, develop, test, and validate mechanical reactor reactivity-control systems and precision actuation mechanisms. Responsibilities include defining requirements and architecture, performing mechanism trade studies and FMEA, designing components for high-temperature and radiation environments, conducting design-for-manufacturability assessments, developing verification plans, and collaborating with multidisciplinary engineering teams and vendors.

Lead the design, development, testing, and validation of mechanical reactor reactivity-control systems. Design precision mechanisms, actuation solutions, linkages, interfaces, and instrumentation for high-temperature, high-stress, and radiation environments. Define requirements, architectures, and verification plans; conduct FMEA, DFM assessments, trade studies, vendor evaluations, and cross-functional collaboration across thermal, structural, neutronics, controls, and simulation teams.

Design and integrate Power Conversion System hardware, including pressure boundaries, piping, supports, rotating machinery interfaces, high-temperature components, and modular plant layouts. Own pressure budgets, thermal growth, leak-tightness, maintainability, and mechanical interfaces. Develop production-intent models and drawings, support fabrication, assembly, test rig design, instrumentation, commissioning, and troubleshooting, and use test data to improve component performance and life.

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.

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.

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, 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 role involves designing, analyzing, and integrating propulsion systems, managing prototype builds, and collaborating across teams for hardware development.

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.