Top Mechanical Design Engineer Jobs in Los Angeles, CA

Designs, analyzes, sustains, and documents C-17 aircraft mechanical systems, including flight controls, hydraulics, actuators, landing gear, environmental control, fuel, and cargo systems. Responsibilities include creating drawings and specifications, supporting design reviews, evaluating suppliers, resolving field issues, performing root cause analysis, communicating with Air Force customers, mentoring engineers, and leading small teams. Occasional travel to supply chain locations and military bases is required.

Design and analyze satellite solar arrays and battery mechanical/electro-mechanical systems. Lead design, testing, qualification, failure investigations, and cross-functional coordination. Produce mechanical/electrical layouts using Creo/AutoCAD, apply GD&T and DFMAT, and serve as a technical lead or Responsible Engineering Authority on spacecraft solar and battery hardware.

Create parametric CAD models and drawings from naval, aerospace, legacy, and customer technical data. Develop models for each manufacturing state, manage PLM structures and release workflows, execute design changes across part families, and collaborate with manufacturing, tooling, programming, and inspection teams. The role requires production mechanical design experience, proficiency in parametric 3D CAD, GD&T knowledge, drawing standards expertise, and experience coordinating releases across multiple products.

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, builds, commissions, and maintains automated test infrastructure and ground support equipment for spacecraft and propulsion hardware. Integrates mechanical, electrical, fluid, instrumentation, PLC, and data acquisition systems. Owns systems from concept through fabrication and ongoing support, ensuring high uptime and predictable performance. Collaborates with propulsion, avionics, GNC, and manufacturing teams while documenting systems and supporting PLC and EtherCAT tooling.

Designs, builds, commissions, and maintains automated test infrastructure and ground support equipment for spacecraft and propulsion hardware. Integrates mechanical, electrical, fluid, instrumentation, PLC, and data acquisition systems. Owns systems from concept through fabrication and ongoing support, ensuring high uptime and reliable production operations. Partners with propulsion, avionics, GNC, and manufacturing teams while documenting systems and improving internal PLC and EtherCAT tooling.

Design and coordinate HVAC systems for commercial, institutional, and industrial buildings. Responsibilities include load calculations, equipment selection, ductwork and hydronic layouts, technical documentation, interdisciplinary coordination, field surveys, retrofit solutions, construction administration, RFI responses, submittal reviews, and client collaboration. The engineer supports project managers while ensuring compliance with building codes, energy standards, and project requirements.

Design and integrate rugged avionics enclosures, mounts, and brackets for human-rated space stations. Responsibilities include electronics packaging, interface documentation, requirements validation, thermal and structural analysis, engineering drawings, configuration management, hardware builds, and environmental qualification testing. The role collaborates closely with electrical engineering teams throughout the flight-critical product lifecycle and supports mission-critical testing and integration.

Develop thermal-hydraulic models for scientific apparatus using ASME B31.3-2022 for installation at a research reactor. Perform steady-state and transient temperature modeling, work independently, and coordinate with EPC contractors and vendors on costs and budgets. The role is remote, part-time, and temporary, with at least four required site visits to State College, Pennsylvania. U.S. citizenship, background screening, drug-free status, and references are required.

Designs mechanical and electromechanical test fixtures, tooling, and related hardware for optical networking products. Responsibilities include CAD modeling, engineering drawings, BOMs, configuration-controlled documentation, engineering analysis, tolerance studies, fabrication support, assembly, troubleshooting, validation, and deployment. The role collaborates with engineers, technicians, suppliers, and manufacturing partners to deliver reliable, manufacturable solutions throughout the product development lifecycle.

Lead the architecture, hydraulic design, documentation, integration, manufacturing readiness, controls coordination, and commissioning of liquid-cooling and mechanical distribution systems for modular AI data centers. Own P&IDs, calculations, equipment and valve schedules, interfaces, standards, and performance validation. Collaborate with thermal, electrical, controls, manufacturing, commissioning, supply chain, OEM, and field teams to create scalable, serviceable, repeatable systems for deployment across multiple sites.

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 and own mechanical hardware and mechanisms from concept through production, integration, testing, and launch. Responsibilities include developing requirements, optimizing system designs, applying design for manufacturing, reducing production complexity, conducting environmental and performance testing, and managing product delivery timelines. The role collaborates across engineering and production teams to support Starshield missions and may involve classified programs.

Design, analyze, and integrate mechanical and thermal systems for high-power hybrid-electric propulsion. Lead rotating machinery development, CAD and drawing creation, tolerance analysis, DFM/DFA, prototype assembly, testing, troubleshooting, root cause analysis, and design improvements. Collaborate with electrical, manufacturing, supplier, test, and flight teams while mentoring engineers and contributing to technical standards and propulsion strategy.

Creates and checks complex 3D models, assemblies, drawings, tooling, BOMs, and model-based definitions using CATIA V5 and 3DX. Applies manufacturing knowledge, GD&T, tolerance analysis, interference checks, and installation assessments to aerospace ducting components. Coordinates designs with project and manufacturing engineers, supports shops, customers, and vendors, and performs engineering changes, weight calculations, and design reviews. Mentors junior employees as needed while maintaining compliance with safety and company procedures.

Designs and develops pharmaceutical drug-delivery devices and platforms using CAD, prototyping, testing, tolerance analysis, and Design for Manufacturing principles. Collaborates with internal teams, external consultants, CROs, and manufacturing partners to troubleshoot products, support design controls, build intellectual property, and transfer devices into production. Manages project budgets and timelines while serving as a technical resource for cross-functional 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.

Own the design and delivery of automated factory equipment from concept through production acceptance. Lead cross-functional mechanical, controls, software, and manufacturing teams; define requirements, conduct design reviews, manage phase gates, and ensure equipment meets timeline, cost, reliability, and performance goals. Partner with factory development and production teams to deploy turnkey systems. The role requires mechanical CAD expertise, automated equipment development experience, and collaboration across engineering and manufacturing functions.

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.