Top Mechanical Engineering Jobs in Seattle, WA

Designs, develops, integrates, and fields next-generation autonomous aircraft systems. Responsibilities include electro-mechanical avionics packaging, electrical interconnects, thermal management, aircraft integration, structural and modal analysis, environmental and EMI/EMC compliance, design reviews, validation, failure analysis, and flight test readiness.

Design, prototype, test, and troubleshoot mechanical systems for autonomous agricultural weeding robots. The engineer will own mission-critical vehicle systems, solve field issues, build durable designs, and collaborate across disciplines in a fast-paced startup environment. Designs must withstand challenging farm conditions and reach production quickly.

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.

Supports mechanical, plumbing, controls, and cooling design for data center projects from site origination through operations. Coordinates consultants, evaluates customer requirements, supports construction documents and permitting, provides field engineering support, reviews contractor submittals and RFIs, identifies project risks, and improves constructability. Requires data center or complex industrial MEP experience, HVAC and plumbing knowledge, and familiarity with BMS/EMS, sustainability, and construction practices.

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.

Design and develop mechanical and actuated systems for autonomous UAVs, owning concept-to-production CAD, kinematic and structural analysis, FEA, prototyping, testing, and cross-functional integration to meet performance, schedule, and reliability goals.

Design and own rocket engine TCA hardware through requirements, analysis, manufacturing, testing, and flight qualification. Responsibilities include mechanical design, FEA, tolerance analysis, tooling and fixture design, advanced manufacturing process development, hotfire test execution, documentation, and rapid redesign. The engineer works closely with propulsion, manufacturing, machinists, welders, technicians, and test teams in an onsite shop and laboratory environment.

Lead battery system architecture, design, qualification, integration, and production for X-BAT, launch/recovery vehicles, and ground equipment. Deploy high-voltage, high-power battery systems, build team and lab, perform verification, debug complex electrical and environmental issues, and provide mentorship and program leadership.

Lead design and execution of mechanical and structural test plans, build and operate hydraulic test fixtures, integrate and calibrate sensors, automate data collection and analysis with Python, produce technical reports, perform CAD design and collaborate across engineering teams to validate hardware performance.

Lead architecture, design, and development of precision wire harnesses and cable assemblies for autonomous UAVs. Own 3D CAD routing, analysis, prototypes, and testing. Perform electrical and environmental reliability analysis, integrate with avionics/systems/manufacturing, and mentor engineers to establish harness design best practices.

Lead mechanical design of ground support equipment (GSE) for next-gen UAS: create CAD models and drawings, perform structural/thermal/fatigue analysis, oversee prototyping and testing, integrate with aircraft systems, support flight tests, and develop documentation for field sustainment.

Design and develop structural and mechanism systems for autonomous UAV launch/recovery. Create CAD models, perform structural and kinematic calculations and preliminary FEA, prototype and test mechanisms, support pre-production and flight testing, collaborate with cross-functional teams, participate in design reviews, and improve design processes and configuration management.

Lead mechanical design and spatial integration of secondary support structures and subsystem installations for aerospace vehicles. Develop CAD models, installation drawings, routing solutions (EWIS, hydraulic, ECS, fuel, pneumatic), perform fitment and tolerance analyses, define installation strategies, support procurement/fabrication and prototype builds, and coordinate across manufacturing, structures, avionics, systems, and test teams through design reviews and BOM management.

Lead mechanical design of rugged, deployable Ground Support Equipment (GSE) for next-generation UAS. Create CAD models and drawings, perform structural/thermal/fatigue analyses, run trade studies, oversee prototyping and testing, develop technical documentation, collaborate with manufacturing/suppliers, and support flight test campaigns to meet military and aviation standards.

Lead supplier development for machined parts: audit and improve supplier processes, perform on-site quality investigations, support NPI, provide technical guidance on specifications and manufacturing, monitor supplier performance, and mitigate supply chain risks to enable scalable aerospace production.

Design mechanical building systems, including HVAC, plumbing, fire protection, and energy modeling, under the guidance of experienced engineers. Develop Revit and AutoCAD proficiency, perform mechanical calculations and thermal simulations, interpret plans and building codes, create system layouts, support engineering documentation, and assist with construction administration.

Mechanical Engineering Intern supporting sustainable building design through CAD and Revit, energy modeling, HVAC and plumbing layouts, design calculations, specifications, cost estimates, construction administration, commissioning, site observations, and energy and water analysis. The 10–12 week on-site program offers hands-on experience across building design projects and requires mechanical engineering coursework, communication skills, and an interest in sustainable design.

Designs and develops mechanical engineering solutions for consumer, medical, clean technology, and automation products. Works hands-on in ambiguous, fast-paced environments with clients and cross-functional teams. Responsibilities include troubleshooting components and cables, applying materials expertise, GD&T, metrology, FEA and simulation, supporting overseas vendors, and delivering products from concept through production. The role is on-site five days per week and may involve travel between client locations.

Designs process-mechanical systems for water and wastewater treatment infrastructure, including equipment, piping, pumping, hydraulics, aeration, and pipe supports. Develops calculations, specifications, drawings, and BIM models; coordinates interdisciplinary design teams; reviews construction submittals; responds to contractor inquiries; and performs site observations. The role also supports construction phases, manages design tasks, and may mentor less experienced staff.

Leads mechanical application engineering for prefabricated data-center platforms, including fan coil units, chilled-water skids, hydronic systems, and integrated assemblies. Translates customer requirements into manufacturable designs, sizes mechanical components, develops BOMs and technical documentation, and supports prototyping, FAT/SAT, and first-article builds. Collaborates with electrical, controls, supply chain, sales, operations, vendors, and fabricators while applying DFM/VAVE principles and maintaining revision-controlled documentation.

Supports manufacturing and delivery of mechanical cooling equipment for data centers. Evaluates supplier readiness, production capacity, manufacturing processes, quality, and field performance; identifies improvements; manages supplier reviews and issue resolution; and collaborates with engineering, sourcing, construction, suppliers, and contractors. Requires 25–50% domestic travel to supplier facilities and construction sites.

Performs mechanical design for power system products, converting prototypes into commercially viable systems. Responsibilities include cooling calculations, design compliance, customer consultation, installation inspections, engineering reports, technical manuals, and use of computer-assisted design software. Provides guidance to Level 1 engineers and designers. The position is onsite in Monroe, Louisiana, includes 5–10% travel, and requires three months of onsite training at an out-of-state facility.