Senior Engineer, Plant Thermal Hydraulics Methods System OneSenior Engineer, Plant Thermal Hydraulics MethodsBellevue, WARemote$52–$85 / hourOther engineering activities include, but are not limited to, system transient codes development and maintenance, performing reactor transient analyses, code benchmark with Integral Effect Tests (IETs) or Separate Effect Tests (SETs), scaling analysis, software commercial-grade dedication, contributing to code assessment and adequacy evaluation, as well as performing verification and validation activities. Requirements Degree in Mechanical, Nuclear, Chemical Engineering, or similar fields, with 5+ years of experience in system-level thermal hydraulic modeling and method development for nuclear or complex energy systems.
Principal Engineer, Plant Design Integration System OnePrincipal Engineer, Plant Design IntegrationBellevue, WARemote$69–$116 / hourThe ideal candidate will bring a broad nuclear engineering background, strong knowledge of NRC regulations, and the ability to lead cross-functional technical decisions affecting the overall plant design. Responsibilities: Support the development and maintenance of the Reactor Plant architecture and programs, ensuring integration of complex technical areas spanning design, analysis, licensing, and testing.
Fuel Handling System Design Engineer, Electrical System OneFuel Handling System Design Engineer, ElectricalBellevue, WARemote$69–$115 / hourDevelop design deliverables including single-line diagrams, wiring diagrams, control panel layouts, cable schedules, grounding/bonding plans, instrumentation specifications, and interface control documents. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
Sodium Fire Design and Analysis Engineer System OneSodium Fire Design and Analysis EngineerBellevue, WARemote$102–$130 / hourOther engineering activities include, but are not limited to, contributing to the development of computational methodologies and models, contributing to software commercial grade dedication, participating in hazard analysis, participating in Phenomena Identification and Ranking Table (PIRT) exercises, participating in Structures, Systems and Components (SSC) classification, developing analytical methods, performing analysis of sodium fire as well as verification and validation activities. The successful candidate will be responsible for developing sodium fire modeling methodologies, performing commercial grade dedication of sodium fire modeling codes, and performing sodium fire modeling calculations to support our client’s design and licensing.
Materials Engineer System OneMaterials EngineerBellevue, WARemote$36–$95 / hourPerform scientific analysis of reports and test data (e.g., metallography, non-destructive inspection, mechanical properties, ductility) and generate technical specifications to document new knowledge related to reactor design and qualification. This role will work as part of a high functioning team of engineers focused on materials, processes, supply chain development and supplier qualification for next generation material and components for sodium cooled fast reactors.
Component Engineer, Nuclear System OneComponent Engineer, NuclearBellevue, WARemote$52–$85 / hourSystem One, and its subsidiaries including Joulé 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.
Nuclear Maintenance & Technical Training Developer / Instructor (Electrical) System OneNuclear Maintenance & Technical Training Developer / Instructor (Electrical)Bellevue, WARemote$56–$95 / hourIncorporates information gained from INPO Significant Operating Experience Reports, NRC Circulars, Bulletins, and Information Notices, plant design changes, plant procedure changes and revisions, new regulations, and training effectiveness reports into the training program and various training material. Provides training and instruction on Electrical Systems including operation, maintenance, troubleshooting, and repair of nuclear plant electrical systems such as pumps, valves, turbines, and heat exchangers.
System Design Engineer, Fluids System OneSystem Design Engineer, FluidsBellevue, 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.
System Design Engineer, Electromagnetic Pumps System OneSystem Design Engineer, Electromagnetic PumpsBellevue, WARemote$69–$115 / hourGenerate design package for pumps, pump support systems, sub-systems, and equipment designs including coordination of calculations, design reports, mechanical drawings, and engineering design specifications. This individual will provide technical ownership of a submersible EM pump operating within a liquid-sodium processing system and coordinate with multidisciplinary engineering teams, suppliers, and testing personnel.
NewThermal Analysis Engineer System OneThermal Analysis EngineerBellevue, WARemote$52–$85 / hourPerform 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 Fuel Handling System Design Engineer System OneSenior Fuel Handling System Design EngineerBellevue, WARemote$69–$115 / hourSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Develop analyses such as thermal, seismic, structural, pipe stress, heat transfer, and integrate results into plant design delivery.
NewFuel Handling Mechanical Design Engineer System OneFuel Handling Mechanical Design EngineerBellevue, WARemote$52–$86 / hourSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Complete design through calculations, developing drawings, using and writing software and commercially available engineering tools.
Senior Engineer, Plant Thermal Hydraulics Validation System OneSenior Engineer, Plant Thermal Hydraulics ValidationBellevue, WARemote$56–$95 / hourDefine validation needs, develop test requirements, and collaborate closely with test engineering teams to ensure alignment between model gaps and experimental programs. Apply and improve SQA and NQA1 modeling quality practices and ensure traceability and configuration control of analysis inputs, models, and results.
Senior Engineer, Fuel Handling and Dry Storage System OneSenior Engineer, Fuel Handling and Dry StorageBellevue, WARemote$52–$85 / hourThis role is responsible for the engineering design of spent fuel pool systems, dry cask storage equipment, and associated mechanical systems while supporting licensing, regulatory compliance, and multidisciplinary engineering activities. System One is seeking an experienced Senior Fuel Handling & Dry Storage System Engineer to support the design, analysis, and qualification of nuclear fuel handling and dry storage systems for advanced nuclear energy projects.
System Design Engineer, Sodium Cover Gas Systems System OneSystem Design Engineer, Sodium Cover Gas SystemsBellevue, WARemote$69–$115 / hourInterface with the design team to create and manage drawing packages of system designs, including but not limited to Piping and Instrumentation Diagrams (P&IDs), 3D models, and system interface drawings. B.S. in Mechanical, Chemical, Nuclear Engineering, or related discipline from an accredited university and 10+ years direct experience with proven mechanical systems skills.
Senior Fuel Handling Mechanical Design Engineer System OneSenior Fuel Handling Mechanical Design EngineerBellevue, WARemote$56–$95 / hourWorking experience with design codes such as the ASME Boiler and Pressure Vessel Code Section III, or Section VIII is preferred but not required. 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.
Fuel Handling System Design Engineer System OneFuel Handling System Design EngineerBellevue, WARemote$52–$85 / hourSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Develop analyses such as thermal, seismic, structural, pipe stress, heat transfer, and others, integrating results into plant design delivery.
Plant Radiological Integration Engineer System OnePlant Radiological Integration EngineerBellevue, WARemote$69–$115 / hourResponsibilities Coordinate between design teams working on plant source term and radiological release analysis, risk analysis, plant operations and SSC radiological shielding design teams. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
Nuclear 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.
In-Vessel Transfer Machine (IVTM) Test Engineer System OneIn-Vessel Transfer Machine (IVTM) Test EngineerBellevue, WARemote$46–$77 / hourThis role leads test campaigns from planning through execution, working closely with multidisciplinary teams to ensure testing is performed safely, efficiently, and in accordance with applicable quality and regulatory requirements. The IVTM Test Engineer will work as part of a high-performing team of engineers and scientists, using their testing experience to guide and inform the development of the in-vessel transfer machine.