• Senior Cloud Security Specialist (API) - onsite

    Washington, DC

    Senior Cloud Security Specialist (API) Washington, DC – onsite US citizenship required per government contact Must be able to obtain Public Trust clearance Type: Multi-year Contract Open to W2 and C2C Deadline to apply: May 5th We are seeking a Senior ...

    Date Posted: 04/24/2026

  • Test & Commissioning Site Supervisor

    Bellevue, Washington

    Job Title: Test & Commissioning Site Supervisor Location: Bellevue, Washington Type: Direct Hire Compensation: $90,000 - $120,000 Contractor Work Model: Onsite – onsite Hours: 40.0 Overview Lead and coordinate the commissioning and validation activitie...

    Date Posted: 04/23/2026

  • OSP Field Engineer

    Seattle, WA

    Mountain Ltd. has an opening for an OSP Field Engineer in the Seattle, WA area! Since 1979, Mountain Ltd has successfully created and supported turnkey engineering solutions for traditional and wireless telecom providers across the United States. We ar...

    Date Posted: 04/23/2026

  • B2B Sales Representative / Business Development

    Washington, District Of Columbia

    For immediate consideration, please connect with me on LinkedIn at https://www.linkedin.com/in/dpotapenko and then email your resume, work authorization status, current location, availability, and compensation expectations directly to denis.potapenko@s...

    Date Posted: 04/23/2026

  • Nuclear Operations Procedure Writer

    Bellevue, WA

    Job Title: Nuclear Operations Procedure writer Contractor Work Model: Remote – offsite Responsibilities Develops and executes a plan for creating, organizing, and tracking development of administrative and operating procedures. Develops and maintains t...

    Date Posted: 04/21/2026

  • Radioactive Material Transport

    Bellevue, WA

    Overview: System One is seeking a Radioactive Material Transport Engineer to support advanced nuclear energy initiatives. This role will focus on nuclear packaging, transportation logistics, and regulatory compliance for radioactive materials across th...

    Date Posted: 04/21/2026

  • Nuclear Cyber Security Systems Architect

    Bellevue, WA

    Overview: System One is seeking a Nuclear Cyber Security Systems Architect to support advanced nuclear reactor technologies. This role is focused on the design, development, and integration of cyber and physical security systems within highly regulated...

    Date Posted: 04/21/2026

  • Senior Mechanical Design Engineer

    Bellevue, Washington

    Position Overview: System One is seeking a Senior Mechanical Design Engineer to support the Molten Chloride Fast Reactor (MCFR) program and the Molten Chloride Reactor Experiment (MCRE). This role plays a key part in designing and analyzing mechanical ...

    Date Posted: 04/21/2026

  • System Design Engineer

    Bellevue, WA

    System One is seeking a System Design Engineer to support advanced nuclear reactor development. This role will support the Sodium Processing Systems team, focusing on system design, vendor coordination, and integration of hardware into overall plant sy...

    Date Posted: 04/21/2026

  • Mechanical Design Engineer

    Bellevue, Washington

    Job Title: Mechanical Design Engineer Location: Bellevue, Washington Type: Contract Compensation: $52 - $85 hourly Contractor Work Model: Hybrid System One is seeking a Mechanical Design Engineer to support the Molten Chloride Fast Reactor (MCFR) progr...

    Date Posted: 04/21/2026

  • Mechanical Test Technician

    Bellevue, Washington

    Mechanical Test Technician System One is seeking a Mechanical Test Technician to support advanced engineering and testing activities within the nuclear energy sector. This role is ideal for hands-on, detail-oriented technicians who enjoy working closel...

    Date Posted: 04/21/2026

  • Network Engineer

    Bellevue, Washington

    System One is seeking two motivated, detail-oriented Contract Network Engineers to support a multi-state, multi-site networking infrastructure environment. This role supports commercial, industrial, research, and energy-related network systems. The ide...

    Date Posted: 04/21/2026

  • Senior Engineer

    Bellevue, Washington

    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. This role is focused on high-integrity nucl...

    Date Posted: 04/21/2026

  • System Design Engineer

    Bellevue, WA

    Job Title: System Design Engineer Location: Bellevue, WA Type: Contract Contractor Work Model: Remote – offsite Hours: 40.0 Security Clearance: Not specified Overview Responsibilities Design nuclear and industrial process systems and sub-systems from c...

    Date Posted: 04/21/2026

  • System Design Engineer

    Bellevue, WA

    Position Summary System One is seeking a System Design Engineer to support advanced nuclear reactor projects. This role focuses on system design, analysis, and supplier oversight, supporting complex fluid systems within a highly regulated environment. ...

    Date Posted: 04/21/2026

  • Health Physicist Technician 2

    Everett, Washington

    Job Title: Health Physicist Technician 2 – Contract Company: System One Location: Everett, WA (Onsite) Pay Rate: $28 – $52/hour (based on experience and market) Position Type: Contract Duration: One year with possible extension Schedule: Full-Time (40 ...

    Date Posted: 04/21/2026

  • Thermal Analysis Engineer

    Bellevue, WA

    Job Title: Thermal Analysis Engineer Type: Contract (6 months) Compensation: $52 - $85 hourly Contractor Work Model: Fully Remote System One is seeking a highly motivated Thermal Analysis Engineer. Tasks Perform thermal model development and/or model m...

    Date Posted: 04/21/2026

  • Equipment Qualification Engineer – Mechanical

    Bellevue, WA

    Job Title: Equipment Qualification Engineer – Mechanical Location: Bellevue, WA Type: Contract Compensation: $84.00 - $135.00 Contractor Work Model: Remote – offsite Hours: 40.0 System One is seeking a highly motivated Equipment Qualification Engineer ...

    Date Posted: 04/21/2026

  • Senior Mechanical Engineer

    Bellevue, WA

    Job Title: Senior Mechanical Engineer Location: Bellevue, WA Type: Contract Contractor Work Model: Remote – offsite Hours: 40.0 Responsibilities Design reactor structures and components from concept through final design. Develop equipment and component...

    Date Posted: 04/20/2026

  • Mechanical Designer

    Bellevue, WA

    Job Title: Mechanical Designer Location: Bellevue, WA Type: Contract Compensation: $37.00 - $74.00 per hour Contractor Work Model: Hybrid – onsite and remote Hours: 40.0 hours/week Overview Leave placeholder text here for recruiter to input Responsibil...

    Date Posted: 04/20/2026

  • Territory Sales Engineer Pacific NW (Remote)

    Seattle, Washington

    System One is partnering with a client to find a Territory Sales Manager / Sales Engineer in the Pacific NW Region Responsibilities Develop and execute strategic sales plans to meet and exceed company revenue and growth objectives Build and maintain st...

    Date Posted: 04/15/2026

  • Plant Integrated Analysis Engineer

    Bellevue, WA

    Overview: System One is seeking a highly capable and motivated Plant Integrated Analysis Engineer to support advanced nuclear reactor development within a sodium-cooled reactor program. This role focuses on plant-level thermal-hydraulic and control sys...

    Date Posted: 04/13/2026

  • Mail Engineer

    Washington, DC

    Job Title: Mail Engineer Location: Washington, DC Type: Contract Compensation: $52.50 - $65.00 per hour Contractor Work Model: Hybrid Hours: 40.0 hours/week Security Clearance: Public Trust Responsibilities Support design, configuration, integration, t...

    Date Posted: 04/13/2026

  • Business Operations Associate

    Seattle, Washington

    Job Title: Business Operations Associate Location: Seattle, WA Type: Contract Compensation: $50.00 - $57.13/hr Work Model: Hybrid Hours: Mon-Fri (normal business hours) Responsibilities Support procurement activities by coordinating capital equipment p...

    Date Posted: 04/13/2026

  • Outside Sales Representative - Seattle, WA

    Seattle, Washington

    Job Title: Outside Sales Representative - Seattle, WA Location: Seattle, WA Type: Direct Hire Contractor Work Model: Hybrid – onsite and remote Overview Our client, a global leader in the fintech and payments space, is seeking a dynamic Outside Sales R...

    Date Posted: 04/10/2026

  • Mid-level Full Stack Developer

    Washington, DC

    Mid-level Full Stack Developer (UI heavy) Washington, DC – hybrid (3 days a week onsite) Candidates must be able to work without sponsorship Must be able to obtain Public Trust clearance 6 month contract System One is seeking a mid-level Full Stack Dev...

    Date Posted: 04/10/2026

  • Mechanical Engineer

    Richland, Washington

    Job Title: Mechanical Engineer Location: Richland, WA Contract Duration: Contract with potential for contract-to-hire Compensation: $65 - $75.00/hr Work Model: Onsite Overview: System One is actively seeking a Senior Project Engineer to support complex...

    Date Posted: 04/09/2026

  • B2B Sales Representative

    Seattle, Washington

    For immediate consideration, please connect with me on LinkedIn at https://www.linkedin.com/in/dpotapenko and then email your resume, work authorization status, current location, availability, and compensation expectations directly to denis.potapenko@s...

    Date Posted: 04/09/2026

  • Field Sales Representative / Outside Sales Representative

    Seattle, Washington

    For immediate consideration, please connect with me on LinkedIn at https://www.linkedin.com/in/dpotapenko and then email your resume, work authorization status, current location, availability, and compensation expectations directly to denis.potapenko@s...

    Date Posted: 04/09/2026

  • OSP Construction Inspector

    Spokane, WA

    Mountain Ltd. has an opening for an OSP Construction Inspector in the Spokane, WA area. Since 1979, Mountain Ltd has successfully created and supported turnkey engineering solutions for traditional and wireless telecom providers across the United State...

    Date Posted: 04/08/2026