Senior Process Engineer, Fuel Cycle

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You’ll Be Doing You will be at the forefront of designing the world's first continuous fusion fuel cycle – an opportunity to redefine the future of clean energy for the modern world. You will lead process design and implementation for major systems in our fuel cycle, taking systems from concept to commissioning. You'll work with engineers, scientists, and technicians across the company, with a focus on scaling up and integrating these systems into our commercial fusion platform. You will report to the Fuel Cycle Manager and work onsite at our Everett, WA office. You Will Own creation-to-integration engineering for major components of the fuel cycle, including system process design, procurement, installation, and commissioning Perform detailed design for process equipment such as columns, reactors, membranes, heaters, pumps, and piping under varied conditions (ambient, cryogenic, and vacuum) Use process simulation tools to support design development, integration, and case studies Produce important deliverables including PFDs, P&IDs, H&MBs, HAZOPs, and sizing calculations Independently lead projects across engineering disciplines (mechanical, electrical, controls, and operations) to deliver fully integrated process designs Lead high-level design reviews to validate solutions and incorporate feedback into systems Mentor fuel cycle engineers and work cross-functionally to build technical capabilities across Helion Required Skills Bachelor's degree in Chemical or Mechanical or equivalent experience in chemical process design or development 8+ years of experience delivering full-scope chemical engineering projects, including managing technical deliverables and schedules Experience taking engineering ideas from abstract concepts to physical reality, demonstrated by delivering first-of-a-kind hardware solutions Experience applying first-principles thinking by leading design and troubleshooting in complex engineering systems Experience performing detailed process equipment sizing calculations including chemical, fluid, thermal, mechanical, and relief systems Experience leading and working on multidisciplinary engineering projects #LI-Onsite #LI-TM1 Benefits Our total compensation package includes benefits, including but not limited to: • Medical, Dental, and Vision plans for employees and their families • 31 Days of PTO (21 vacation days and 10 sick days) • 10 Paid holidays, plus company-wide winter break • Up to 5% employer 401(k) match • Short term disability, long term disability, and life insurance • Paid parental leave and support (up to 16 weeks) • Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

{
  "content_hash": "431def8b85f44594c881dc4a89480264cb96c5327058542db3db6b8749b33f59",
  "source_hash": "686569ebea786fc0e50bc1ea44092dc82b35a0ef340d2fbf7d401d8c6d57964e",
  "last_changed_at": "2026-05-29T06:05:33.065Z",
  "active_status": "active"
}

{
  "language": "en",
  "location": {
    "raw": "Everett, WA",
    "city": "Everett",
    "region": "WA",
    "country": "United States",
    "is_remote": false,
    "confidence": 0.9
  },
  "salary_max": null,
  "salary_min": null,
  "inferred_at": "2026-06-06T09:18:47.900Z",
  "launch_scope": {
    "reason": "english_us_canada",
    "included": true,
    "language": "en",
    "location": {
      "raw": "Everett, WA",
      "city": "Everett",
      "region": "WA",
      "country": "United States",
      "is_remote": false,
      "confidence": 0.9
    },
    "countries": [
      "United States"
    ]
  },
  "remote_policy": null,
  "salary_period": null,
  "workplace_type": "on_site",
  "salary_currency": null
}

{}

{
  "id": "9b11de3a-b129-432a-81c2-56dbdf64e5a9",
  "team": "Fuel Cycle",
  "title": "Senior Process Engineer, Fuel Cycle",
  "jobUrl": "https://jobs.ashbyhq.com/helion/9b11de3a-b129-432a-81c2-56dbdf64e5a9",
  "address": null,
  "applyUrl": "https://jobs.ashbyhq.com/helion/9b11de3a-b129-432a-81c2-56dbdf64e5a9/application",
  "isListed": true,
  "isRemote": false,
  "location": "Everett, WA",
  "updatedAt": null,
  "apiVersion": "ashby-non-user-graphql-v1",
  "department": "Fuel Cycle",
  "publishedAt": null,
  "workplaceType": "OnSite",
  "employmentType": "FullTime",
  "secondaryLocations": []
}