Top Mechanical Engineering Jobs in Seattle, WA

Develops mechanical concepts and prototypes for rheology and materials characterization products. Responsibilities include simulations, testing, risk mitigation, system integration, design reviews, product ideation, and comprehensive mechanical documentation. The role collaborates with multidisciplinary teams and applies expertise in mechanical engineering, materials science, thermal and structural analysis, controls, reliability, design for manufacturing, and fabrication.

Designs, analyzes, prototypes, tests, and improves industrial poultry-processing equipment. Responsibilities include CAD modeling, FEA, engineering drawings, risk analysis, prototype integration, manufacturing support, field troubleshooting, customer issue resolution, spare-parts planning, and upgrade-kit development. The role collaborates with manufacturing, sourcing, quality, service, and customers, and requires approximately 20% travel to food-processing plants.

Mechanical Engineering interns support engineering projects through research, analysis, design drawing modifications, prototyping, testing, quality assurance, documentation, and collaboration. Interns gain hands-on experience in office and field settings, participate in training, and contribute to project deadlines. Candidates must study Mechanical Engineering and understand CAD/BIM standards; Revit or AutoCAD training and FE/EIT credentials are preferred.

Leads the design and execution of complex mechanical, HVAC, plumbing, and specialty systems for institutional and healthcare facilities. Oversees design quality, construction documents, specifications, construction administration, project timelines, and coordination with multidisciplinary teams. Drives LEED certification, energy modeling, lifecycle cost analysis, and sustainable design compliance with federal regulations and applicable codes. Requires a mechanical engineering degree, professional engineering license, extensive MEP design experience, LEED certification, and proficiency with Revit, HAP, TRACE 3D Plus, and Bluebeam.

Design and develop balance-of-plant thermal-fluid systems for a first-of-a-kind nuclear power plant, including steam, feedwater, condensate, condenser, heat exchanger, pump, valve, piping, and auxiliary systems. Perform thermal, structural, and fluid analyses; create CAD models and documentation; coordinate with vendors; support manufacturing, testing, commissioning, regulatory submissions, and system integration. Manage bills of materials, configuration control, schedules, budgets, and cross-functional design activities through deployment.

Leads mechanical architecture, design, simulation, verification, validation, and risk management for complex medical devices from conception through launch. Performs tolerance analysis, FEA, kinematic modeling, prototyping, and design-for-manufacturing optimization. Ensures compliance with medical device quality systems and regulations while collaborating with manufacturing, quality, and supply chain teams. Mentors junior engineers, manages multiple projects, and prepares technical documentation and presentations.

Leads mechanical product development, conceptual and detailed design, engineering analysis, prototyping, design reviews, and new product introduction. Collaborates with industrial designers, customers, manufacturing, sales, and engineering teams to resolve technical issues and ensure products meet performance, quality, regulatory, and manufacturability requirements. Performs FEA on plastic and metal designs and supports APQP, DFMEA, PFMEA, testing, documentation, and product release.

Designs and develops mechanical product assemblies, fixtures, enclosures, and manufacturing processes for predictive-maintenance products. Responsibilities include SolidWorks modeling, component DFM/DFA, BOMs, drawings, material selection, prototype building and testing, structural integrity, regulatory compliance, and production readiness. The role coordinates with internal teams, supply-chain partners, and manufacturers while managing schedules and communicating progress on a distributed remote team.

Leads HVAC and plumbing design engineering for higher education, ports, and energy projects. Manages multidisciplinary teams and multiple projects from proposals through construction completion, including budgeting, scheduling, planning, design, specifications, client presentations, energy studies, and code compliance. Requires a professional engineering license, bachelor's degree in mechanical engineering, and at least eight years of relevant experience.

Own the payload fairing jettison system from requirements and dynamics analysis through design, testing, vehicle integration, flight operations, refurbishment, and reuse. Design and qualify pneumatics, actuators, and mechanisms; create CAD and manufacturing drawings; conduct structural and clearance analyses; troubleshoot failures; lead design reviews and integrated tests; and develop next-generation reusable separation systems.

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.

Perform failure analysis on high-voltage vacuum amplifiers using SEM, FIB, EDS, and cross-sectioning techniques. Identify failure mechanisms, determine root causes, improve analysis workflows, monitor quality and yield metrics, and drive corrective actions with design, manufacturing, and supply chain teams. The role also develops tools for analyzing field and laboratory data and supports product reliability improvements in cleanroom and ESD-controlled environments.

Design and quality-check commercial HVAC and electrification systems, including VRF, heat pumps, ERV, and DOAS installations. Develop load calculations, equipment selections, refrigerant piping designs, standards, and contractor-ready scopes. Support commissioning, troubleshooting, energy savings calculations, utility incentives, controls coordination, and hydronic engineering. Collaborate with cross-functional teams, contractors, manufacturers, and third-party MEP firms while mentoring engineers and scaling repeatable UHP project designs.

Design and manage mechanical engineering projects involving moveable structures, industrial waterfront infrastructure, machinery, piping, hydraulic systems, and bulk material handling. Perform machine design, stress and fatigue analysis, FEA, kinematic and dynamic analysis, and develop SolidWorks drawings. Collaborate with multidisciplinary teams and clients, support project delivery, and conduct occasional field observations at project locations.

Design and support mechanical engineering projects involving movable bridges, industrial waterfront infrastructure, machinery, hydraulic systems, piping, pumps, and bulk material handling. Perform mechanical analysis, stress and force analysis, machinery component design, weldment design, and CAD modeling. Collaborate with project teams and clients through project development, conduct occasional field observations, and contribute to project engineering and management.

Designs and develops mechanical systems for compact radar and other electro-mechanical products. Responsibilities include addressing thermal, electrical, environmental, PCB packaging, RF isolation, structural, modal, and stress considerations; advising cross-functional engineering teams; applying GD&T; performing computational analyses; and supporting products through qualification and launch. The role may also involve production-process optimization, IP-rated product design, fabrication coordination, and export-controlled technology compliance.

Own mechanical hardware systems from requirements through design, manufacturing, testing, integration, production, maintenance, and repair. Responsibilities include subsystem architecture, detailed CAD design, tolerance analysis, design for manufacturability, vendor coordination, test fixture development, instrumentation, data analysis, failure analysis, documentation standards, and hands-on warehouse testing of physical products.

Design, fabricate, test, and iterate mechanical components and assemblies. Build and wire prototypes, perform machining and 3D printing, run tests, analyze data, write Python or C scripts for hardware testing, integrate systems, document work, and maintain or repair hardware in service.

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.

Designs HVAC, plumbing, and petroleum systems for major federal construction and renovation projects. Provides technical reviews, design and construction support, field inspections, commissioning support, budget and schedule tracking, dashboard reporting, regulatory research, contractor submittal review, quality assurance, meeting coordination, project documentation, and briefings for NAVFAC stakeholders. Requires a four-year engineering degree and at least six years of relevant design or design-management experience.

Design, analyze, prototype, manufacture, and test mechanical components and assemblies for chemical rocket engines and in-space propulsion systems. Lead design reviews, create CAD models, drawings, bills of materials, and work instructions; perform structural, thermal, and fluid analyses; coordinate vendors and cross-functional teams; support hardware assembly, testing, data analysis, risk mitigation, and customer communication.

Designs and delivers rugged mechanical systems for autonomous heavy equipment, including sensor mounts, compute enclosures, structural brackets, safety housings, and environmental protection systems. Responsibilities span CAD, FEA, prototyping, testing, failure analysis, manufacturing documentation, vendor collaboration, cross-functional integration, and field debugging. The role also mentors engineers and improves mechanical engineering standards, validation practices, and design processes.

Design, prototype, test, and improve mechanical systems for robotic actuators, joints, and assemblies. The role includes motor sizing, wiring layouts, thermal management, CAD development, GD&T, sensor and electronics integration, bench validation, and collaboration with manufacturing partners on casting, machining, and assembly. The engineer will also support automation and system integration during robotic builds.

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.

Designs and develops fluid and mechanical subsystems for rocket-engine ground test facilities. Responsibilities include propellant delivery systems, cryogenic and vacuum systems, hazardous-propellant procedures, structural and fluid analysis, component selection, build reviews, commissioning, supplier coordination, hazard analysis, and mentoring junior engineers.