Senior Mechanical Engineer (Vessels) System OneSenior Mechanical Engineer (Vessels)Bellevue, WARemote$69–$115 / hourul>Perform detailed design, analysis, and documentation for ASME Section III Class HB and/or Section VIII division 2 vessels, including nozzles, flanges, support brackets, and other support elements used in nuclear facilities. Minimum of six years of equipment / component design experience for level 10 or minimum of ten years of equipment / component design experience for level 11; relevant M.S. degree credited as two years of experience.
Senior Mechanical Engineer System OneSenior Mechanical EngineerBellevue, WARemotep>System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Working experience with ASME Boiler & Pressure Vessel Code Section III.
Senior Mechanical Engineer - Remote System OneSenior Mechanical Engineer - RemoteSeattle, WARemote$55–$75 / hourThis position will play a key role in managing multi-discipline engineering efforts, supporting EPCm-style projects, and ensuring successful project execution across safety, quality, cost, and schedule. This role is ideal for a hands-on engineering professional who is experienced across the full project lifecycle—from concept and pre-FEED through commissioning and startup.
CRD System Design Engineer (Mechanical) System OneCRD System Design Engineer (Mechanical)Bellevue, WARemote$54–$90 / hourp>The selected candidate will collaborate with project managers, design engineers, analysts, test engineers, supply chain teams, and other engineering disciplines to support the successful development and deployment of advanced reactor technology. The successful candidate will demonstrate strong technical leadership, engineering excellence, attention to detail, and the ability to thrive in a fast-paced, collaborative engineering environment.
NewSenior Mechanical Design Engineer System OneSenior Mechanical Design EngineerBellevue, WARemote$52–$85 / hourp>The ideal candidate has extensive experience in mechanical equipment design, structural analysis, and product development, with the ability to collaborate across multidisciplinary engineering teams to deliver innovative engineering solutions. System One is seeking a highly motivated Senior Mechanical Design Engineer (Core Components) to support the design and development of advanced nuclear reactor technologies.
NewMechanical Design Engineer System OneMechanical Design EngineerBellevue, WA$52–$85 / hourp>You will work within a high-performing, multi-disciplinary engineering team that includes materials science and thermal-hydraulics experts to develop novel analysis methodologies and support the design of next-generation reactor hardware. Contractor Work Model: Hybrid System One is seeking a Mechanical Design Engineer to support the Molten Chloride Fast Reactor (MCFR) program.
RAC System Design Engineer (Mechanical) System OneRAC System Design Engineer (Mechanical)Bellevue, WARemote$54–$90 / hourp>The selected candidate will collaborate with project managers, design engineers, analysts, test engineers, and multidisciplinary engineering teams to support the successful design, integration, and deployment of this first-of-a-kind reactor technology. This role will support the ongoing development of a passive reactor cooling system designed to continuously remove heat through natural convection, providing safe and reliable cooling without reliance on pumps or operator actions.
Mechanical Designer System OneMechanical DesignerBellevue, WA$37–$74 / hourp>System One is seeking a Mechanical Designer to support the design and development of advanced nuclear reactor technology. Design mechanical and structural components, test fixtures, flow loops, rigs, and sub-scale test articles.
Embedded Solutions Engineer – Space Systems JobotEmbedded Solutions Engineer – Space SystemsSeattle, WA$126,000–$250,000 / yearFPGA Integration (Optional): Experience interfacing with or developing alongside FPGAs, including familiarity with common communication interfaces (AXI, PCIe, custom parallel buses),register-mapped peripheral access from embedded Linux or bare-metal environments, and collaborative bring-up with digital design engineers. Excellent Communication Skills: Effectively convey ideas and communicate technical topics with engineering, build staff, and operations; run self-directed design reviews and participate in reviews of parallel systems.
Senior Mechanical Designer System OneSenior Mechanical DesignerBellevue, WA$69–$115 / hourThis role is responsible for creating structural and mechanical design solutions, developing 3D CAD models, and producing detailed engineering drawings to support conceptual and preliminary design efforts. System One is seeking a highly motivated Senior Mechanical Designer to support the design and development of advanced Generation IV nuclear reactor systems.
Applications Engineer / BAS Programmer JobotApplications Engineer / BAS ProgrammerSeattle, WARemote$90,000–$120,000 / hourThe right candidate will work closely with engineering, project management, and field teams to turn mechanical and electrical system designs into fully operational BAS and controls platforms that optimize building performance, reliability, and efficiency. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewNuclear Engineering Program Developer System OneNuclear Engineering Program DeveloperBellevue, WARemote$56–$95 / hourThe successful candidate will coordinate with engineers working on systems, components, or engineering analysis areas such as safety analysis, thermal analysis, stress analysis, and/or process/control analysis. Provide inputs on plant level and system level requirements, specifications, and strategy documents related to plant operations and maintenance activities over the lifecycle of a nuclear facility.
NewEngineering Technician II and IV (TISS, WA) Strategic Technology Institute Inc,Engineering Technician II and IV (TISS, WA)Keyport, WAp>This posting covers two levels: Engineering Technician II (entry-level with 1+ year of experience) and Engineering Technician IV (senior-level with 5+ years of experience). Support undersea tracking range operations by operating and maintaining range support systems (electronic, acoustic, video, mechanical, electro-hydraulic).
Senior Engineer System OneSenior EngineerBellevue, WARemote$56–$95 / hourThe successful candidate will be responsible for preparing, reviewing, and certifying Design Specifications (DS) and Design Reports (DR) in accordance with ASME Boiler & Pressure Vessel Code Section III, while supporting regulatory, compliance, and customer deliverables. System One is seeking an experienced Senior Mechanical Engineer to support the design and development of reactor structures and components for a next-generation Generation IV advanced nuclear reactor program.
EWIS Engineer (w/Capital Harness Experience) 804 TechnologyEWIS Engineer (w/Capital Harness Experience)Seattle, WA$165,000–$184,000 / yearFull timeYou will play a key part in ensuring wiring harnesses and interconnection systems meet all functional, safety, and certification requirements while delivering high-quality engineering solutions to our customers. We are seeking a talented EWIS (Electrical Wiring Interconnection System) Engineers with 5+ years of drawing and design experience in Siemens Capital Harness (Capital).
Flight Test Engineer 804 TechnologyFlight Test EngineerSeattle, WA$85–$95 / hourFull timeDesired for Cross-Training Opportunities: Aerospace engineering experience in Flight Sciences, including experience in aerodynamic testing and/or design; flight testing of aircraft performance and handling characteristics, including experience with take-off; landing; climb and route performance; static-source error corrections and stall speed testing; longitudinal & lateral/directional stability and control; minimum control speeds; stall characteristics; high speed characteristics, crosswind takeoff/landing and flight into known icing. The primary role in this position is as a Flight Test Engineer who is responsible for coordinating test and certification requirements, authoring and executing flight and ground test plans for a wide variety of aircraft platforms including FAA Part 23, 25, 27 and 29 as well as new and novel technology demonstrator programs such as electric and hydrogen propulsion.
Process Engineer V # 26-12762 US Tech SolutionsProcess Engineer V # 26-12762Redmond, WA$60–$120 / hourContractorFull timeThe successful candidate will possess experience with a wide variety of manufacturing processes, be comfortable driving a team of engineers to rapidly develop and scale Client manufacturing processes and have the ability to work with a team of researchers with tolerance for a high degree of ambiguity. Experience with mass production of systems requiring multiple manufacturing processes such as: miniature motorized mechanisms; soft goods cutting, laminating, and kitting; active optical alignment, casting, molding, machining, electronics packaging, coatings, additive manufacturing.
NewSystem Design Engineer System OneSystem Design EngineerBellevue, WARemote$69–$115 / hourThis role will support the Sodium Processing Systems team, focusing on system design, vendor coordination, and integration of hardware into overall plant system architecture for a next-generation nuclear reactor program. Bachelor’s degree in Mechanical Engineering, Chemical Engineering, or related discipline from an accredited university.
NewHardware Systems Engineer MicrosoftHardware Systems EngineerRedmond, WA$100,600–$199,000 / yearResponsibilities will include architecting and developing efficient test and debug frameworks for cutting edge technologies, building test and debug automation, partnering with leading technology providers to define test and debug strategies, driving unified and efficient test, validation and debug methodologies across product segments. Masters Degree in Electrical Engineering, Computer Engineering, Mechanical Engineering, or related field OR Bachelors Degree in Electrical Engineering, Computer Engineering, Mechanical Engineering, or related field AND 2+ years technical engineering experience OR equivalent experience.
NewProbabilistic Risk Assessment (PRA) Engineer (Entry Level) System OneProbabilistic Risk Assessment (PRA) Engineer (Entry Level)Bellevue, WARemote$37–$74 / hourp>The selected candidate will contribute to the development and maintenance of PRA models, perform risk analyses, support hazard evaluations, and collaborate with engineering teams to ensure safe, reliable, and innovative reactor designs. This role offers an excellent opportunity to work with a multidisciplinary engineering team performing probabilistic risk assessments, severe accident analysis, and safety evaluations that support reactor design, licensing, and regulatory compliance.
Fuel Handling Design Engineer System OneFuel Handling Design EngineerBellevue, WA$52–$85 / hourli>Interface with cross-functional design disciplines (mechanical, instrumentation & controls, civil, nuclear) to develop plant design information and define system design/performance criteria. Physical requirements include sitting and/or standing for extended periods, bending/stooping, grasping/gripping, fine motor control, with minimal physical exertion, including the ability to safely lift up to 25 pounds.
Weld Engineer System OneWeld EngineerBellevue, WA$63–$80 / hourp>System One is seeking a highly motivated Weld Engineer to support a Materials Development & Qualification team advancing next-generation materials and components for sodium-cooled fast reactors. This is a hands-on, high-impact role where your weld engineering and metallurgy expertise will influence how advanced components are designed, tested, qualified, and transitioned into supplier-ready manufacturing processes.
RAC Component Design Engineer (Ventilation) System OneRAC Component Design Engineer (Ventilation)Bellevue, WARemote$50–$80 / hourli>Provide technical direction and interface to supplier projects, working with supply chain teams to ensure delivery of engineering designs and other deliverables, as well as coordination and performance of technical reviews of deliverables. Interface with and support licensing activities needed to obtain both the construction and operating licenses for the reactor systems including development of safety analysis reports, technical specifications, topical reports, and other licensing documents.
System Transients Analysis Engineer System OneSystem Transients Analysis EngineerBellevue, WARemote$67–$110 / hourThis role will focus on thermal hydraulic and transient analysis activities supporting advanced reactor system design, plant operations analysis, and control system integration. System One is seeking a highly capable and motivated System Transients Analysis Engineer to support an advanced sodium-cooled reactor program.
Plant Integrated Analysis Engineer System OnePlant Integrated Analysis EngineerBellevue, WARemote$37–$74 / hourp>Working as part of a multidisciplinary engineering team, you'll collaborate with safety, instrumentation & controls (I&C), and system design engineers to model, analyze, and validate complex plant systems. System One is seeking a highly motivated Plant Integrated Analysis Engineer to support the development of advanced sodium-cooled nuclear reactor technology.
Component Engineer, Nuclear System OneComponent Engineer, NuclearBellevue, WARemote$52–$85 / hourSystem One, and its subsidiaries including Joulé, ALTA IT Services, and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. This role may require sitting or standing for extended periods, with tasks including bending, grasping, and fine motor control.
NewSenior Welding Engineer System OneSenior Welding EngineerBellevue, WA$56–$95 / hourSystem One is seeking a Senior Welding Engineer for a yearlong contract role to work as part of a high-functioning team of engineers focused on materials processing, supply chain development and supplier qualification for next generation material and components for sodium-cooled fast reactors. Oversee test programs for qualification of welds, including mechanical properties, burst testing, thermal creep, creep-fatigue, neutron irradiation, thermal aging, and sodium exposure .
NewThermal Analysis Engineer System OneThermal Analysis EngineerBellevue, WARemote$52–$85 / hourli>Perform thermal modeling of fluid-structure interfaces, including metallic structure thermal problems with structure conductive heat transfer, air convective heat transfer, radiation, and sodium-structure heat transfer modes. Work with our client’s component design leads and analysis engineers to evaluate specific component issues, develop local models or modify existing, and provide insights and feedback to design teams for action.
Senior Component Design Engineer (RPA) – Contract System OneSenior Component Design Engineer (RPA) – ContractBellevue, WARemote$56–$95 / hourdegree in Mechanical Engineering or equivalent (minimum of eight years of equipment/component design experience; relevant M.S. degree credited as two years of experience) . System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
NewSenior Electrical Engineer - Planning & Coordination MicrosoftSenior Electrical Engineer - Planning & CoordinationRedmond, WA$119,800–$234,700 / yearli>Partner across qubit design, electrical engineering, mechanical engineering, systems engineering, reliability, sourcing, supply chain, fabrication partners, contract manufacturers, system integrators, and leadership teams to align deliverables, resolve blockers, and support high-quality execution. We are seeking a Senior Electrical Engineering - Engineering Planning Coordinator with an electrical engineering background to lead complex printed circuit board (PCB) supplier engagements, drive process development, coordinate multidisciplinary hardware teams, and oversee program schedules, budgets, and resource planning.
Component Design Engineer (RPA) – Contract System OneComponent Design Engineer (RPA) – ContractBellevue, WARemote$52–$85 / hourli>Support continuous learning and application of nuclear industry best practices to maintain the highest quality of engineering design and proactively identify process change/enhancement opportunities. The Component Design Engineer (RPA) will work as part of a high functioning team of engineers and scientists focused on developing the design of next generation advanced nuclear reactors.
Test Engineer III (Metrology) BC ForwardTest Engineer III (Metrology)Redmond, WA$53–$55 / hourFull timeMaster's degree or equivalent experience in Optics, Optical Sciences, Optical Engineering, Physics, Mechanical Engineering, Electrical Engineering, Computer Sciences, or a similar field. The ideal candidate will have strong experience in optical testing, calibration, data analysis, and test automation and a proven ability to develop and execute test procedures, analyze results, and drive hardware quality.
Intern - Mechanical Engineering (Aerospace) Parker Hannifin CorporationIntern - Mechanical Engineering (Aerospace)Woodmont Beach, WA$18.42–$30.70 / hourInternFull timeOur passionate people with deep engineering expertise, together with our breadth of differentiated technologies, ensure that we make the extraordinary happen and continue to shape the future of aviation in partnership with our customers. That is why we are so proud of everyone in our Exotic family who strives to be the best at what they do every day, working as a collaborative team in a culture of continuous improvement to stretch the bounds of creative thinking and provide quality products to our customers around the globe.
R&D Lab Technician - Mechanical Engineering Yoh Services LLCR&D Lab Technician - Mechanical EngineeringRedmond, WAFull timePhysical Requirements:* Ability to lift and move materials up to 50 lbs.* Ability to stand for extended periods and perform hands-on assemblyEstimated Min Rate: $35.00Estimated Max Rate: $40.00/hr+ Depends on work experience. R&D Lab Technician - Mechanical EngineeringWe are seeking a hands-on R&D Lab Technician to support our Mechanical Engineering team in prototyping, assembly, testing, and lab operations.
Mechanical Engineer Gannett Fleming, Inc.Mechanical EngineerTacoma, WAFull timeThis is an excellent opportunity to independently perform mechanical engineering (HVAC and/ or plumbing) design calculations, technical studies and prepares plans and specifications for a wide variety of project types which may include commercial, transportation, education, municipal, aviation, and federal clients. Understands client requirements as they relate to the mechanical scope of work; aligns and develops detailed design documents including drawings, specifications, cost estimates, reports, and calculations.
Senior Mechanical Engineer P2S, Inc.Senior Mechanical EngineerSeattle, WA$148,000–$180,000 / yearFull timeThird-Party Recruiting DisclaimerLegence and its affiliates do not accept unsolicited resumes from agencies; any such submissions without a prior signed agreement authorized by Legence Holdings LLC's CHRO or Director of Talent Acquisition will not incur fees and are considered property of Legence. The company specializes in designing, fabricating, and installing complex HVAC, process piping, and other mechanical, electrical, and plumbing (MEP) systems-enhancing energy efficiency, reliability, and sustainability in new and existing facilities.
Senior Mechanical Engineer - Buildings Colliers Engineering & DesignSenior Mechanical Engineer - BuildingsSeattle, WA$106,600–$140,000 / yearFull timeWe have also created an internal culture that provides the resources and technology needed to encourage personal and professional growth opportunities through reimbursement for education; a free in-house resource for hundreds of educational and self-enrichment courses; mentorship program; wellness program; Women's Organization and ongoing philanthropic opportunities. We provide a full range of mechanical engineering services to municipal, commercial, higher education and public works agencies, partnering with clients to design buildings from the ground-up or to renovate existing buildings to optimize their use.
Mechanical Engineer II Blue Origin LLCMechanical Engineer IISeattle, WAFull timeand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing (CDL drivers only), vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. ITAR RequirementsTo conform to U.S. Government commercial space technology export regulations, including the International Traffic in Arms Regulations (ITAR), 8 U.S.C. § 1324b(a)(3), applicants for employment at Blue Origin must be a U.S. citizen or national, lawfully admitted for permanent residence into the U.S. (i.e. current green card holder), or lawfully admitted as a refugee or granted asylum under 8 U.S.C. § 1157-1158.
Senior Mechanical Engineer (10+ Years) Coffman EngineersSenior Mechanical Engineer (10+ Years)Seattle, WAFull timeOur broad range of markets, clients, and services, coupled with industry-leading talent, provides unique and exciting opportunities to grow as professionals, serve clients, and make a difference in our communities. The role involves working across varied project delivery approaches, managing projects through design and execution, and focusing on sustainable engineering solutions.
Senior Mechanical Engineer | Seattle, WA IMEG Corp.Senior Mechanical Engineer | Seattle, WAQueen Anne, WAFull timeIMEG is hiring a Senior Mechanical Designer in Seattle, Washington, to lead design efforts as a project manager or lead designer for moderate to complex projects and support delivery of larger, high-complexity work with limited senior oversight. In this role, you will provide project direction, engineering solutions, and client guidance while overseeing project management, engineering analysis, design, and implementation of mechanical systems for the vertical building industry.
Civil/Mechanical Engineer III-IV - Water/Wastewater ParametrixCivil/Mechanical Engineer III-IV - Water/WastewaterPuyallup, WA$105,000–$140,000 / yearFull timeProvide knowledge of mechanical infrastructure for pump stations and treatment plants, including HVAC systems, equipment integration (motors, VFDs, and controls), and rehabilitation of aging infrastructure to enhance efficiency and longevity. Parametrix is a 100% employee-owned consulting firm helping clients deliver resilient infrastructure, vibrant and livable communities, and environmentally sustainable solutions.
Mechanical Department Manager - Buildings Colliers Engineering & DesignMechanical Department Manager - BuildingsSeattle, WA$145,000–$209,000 / yearFull timeWe have also created an internal culture that provides the resources and technology needed to encourage personal and professional growth opportunities through reimbursement for education; a free in-house resource for hundreds of educational and self-enrichment courses; mentorship program; wellness program; Women's Organization and ongoing philanthropic opportunities. We provide a full range of mechanical engineering services to municipal, commercial, higher education and public works agencies, partnering with clients to design buildings from the ground-up or to renovate existing buildings to optimize their use.
Associate Mechanical Engineer McKinstryAssociate Mechanical EngineerSeattle, WA$111,420–$187,000 / yearFull timeSPG. account executives to scope and deliver projects such as steam heating conversions, rooftop unit replacement, boiler and chiller replacement, and tenant improvements ranging from commercial office to higher education to life sciences and healthcare. contingent upon successfully passing a pre-employment drug and alcohol test, complying with the requirements of the Immigration Reform and Control Act and a Confidentiality Agreement, in addition to successful outcomes of background and reference checks.
Associate Principal Mechanical Engineer - Data Centers McKinstryAssociate Principal Mechanical Engineer - Data CentersSeattle, WA$130,320–$224,400 / yearFull timeThe role will be a key member of the DCI leadership team representing the Engineering and Design department professionally by engaging deeply with customers to understand their long-term needs and plans and make a compelling case for selecting the McKinstry team. contingent upon successfully passing a pre-employment drug and alcohol test, complying with the requirements of the Immigration Reform and Control Act and a Confidentiality Agreement, in addition to successful outcomes of background and reference checks.
Mechanical Design Engineer III - Blue Ring Mechanisms Blue Origin LLCMechanical Design Engineer III - Blue Ring MechanismsSeattle, WAFull timeand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing (CDL drivers only), vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. ITAR RequirementsTo conform to U.S. Government commercial space technology export regulations, including the International Traffic in Arms Regulations (ITAR), 8 U.S.C. § 1324b(a)(3), applicants for employment at Blue Origin must be a U.S. citizen or national, lawfully admitted for permanent residence into the U.S. (i.e. current green card holder), or lawfully admitted as a refugee or granted asylum under 8 U.S.C. § 1157-1158.
Lead Engineer - Mechanical McKinstryLead Engineer - MechanicalSeattle, WAFull timecontingent upon successfully passing a pre-employment drug and alcohol test,complying withthe requirements of the Immigration Reform and Control Act and a Confidentiality Agreement, in addition to successful outcomes of background and reference checks. Proficient and able to coach/delegate mechanical systems design, including calculations, airside systems, piping systems, equipment selection and multidiscipline coordination.
Lead Mechanical Engineer McKinstryLead Mechanical EngineerSeattle, WA$95,310–$155,700 / yearFull timeSPG. account executives to scope and deliver projects such as steam heating conversions, rooftop unit replacement, boiler and chiller replacement, and tenant improvements ranging from commercial office to higher education to life sciences and healthcare. Employment iscontingent upon successfully passing a pre-employment drug and alcohol test, complying with the requirements of the Immigration Reform and Control Act and a Confidentiality Agreement, in addition to successful outcomes of background and reference checks.
Mechanical Design Engineer (Contract) Zeno PowerMechanical Design Engineer (Contract)Seattle, WA$65–$80 / hourFull timePerson" means (i) a U.S citizen or U.S. national; or (ii) any natural person who is a U.S. Lawful Permanent Resident (i.e., holds a Green Card), as defined by 8 U.S.C. 1101(a)(20) or as a "protected individual" defined by 8 U.S.C. 1324b(a)(3) (i.e., admitted as a refugee or is granted asylum). Zeno is seeking a highly motivated Mechanical Design Engineer to support the mission-oriented efforts of developing and bringing to market Radioisotope Power Systems (RPS) technologies.
Mechanical Design Engineer Remote (Contractor) Zeno PowerMechanical Design Engineer Remote (Contractor)Seattle, WARemoteFull timePerson" means (i) a U.S citizen or U.S. national; or (ii) any natural person who is a U.S. Lawful Permanent Resident (i.e., holds a Green Card), as defined by 8 U.S.C. 1101(a)(20) or as a "protected individual" defined by 8 U.S.C. 1324b(a)(3) (i.e., admitted as a refugee or is granted asylum). Zeno is seeking a highly motivated Mechanical Design Engineer to support the mission-oriented efforts of developing and bringing to market Radioisotope Power Systems (RPS) technologies.