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Subassemblies Specialist

Cfsenergy · Devens, MA · On Site · Active · $90,000–$145,000 / year · Lever

Job facts

FieldValue
CompanyCfsenergy
TitleSubassemblies Specialist
Normalized title-
Department / teamSPARC Tokamak Team / Assembly
LocationDevens, MA, United States
Work modelOn Site
Employment typeFull Time
Salary$90,000–$145,000 / year
Statusactive
ATS providerLever
Posted / first seen2026-05-11 / 2026-05-29
Changed / last seen2026-05-29 / 2026-06-06

Related slices

PageWhat it containsOpen
Company jobsActive postings from Cfsenergy.Open
Company breakdownsRole, location, ATS, and work model facets for this company.Open
ATS provider jobsActive postings observed through Lever.Open
Provider filtered searchThe same provider as a filtered job collection.Open
City jobsActive postings in Devens.Open
Department jobsActive postings in SPARC Tokamak Team.Open
Work model jobsActive On Site postings.Open
Lifecycle eventsOpen, update, close, and reopen events for this posting.Open
Original postingCanonical source or apply URL captured from the ATS.Open

Linked records

CompanyCfsenergy
Sourcebd1d77fb-1ebc-4a7f-932c-220948eab723
ATS providerLever

Description

About Commonwealth Fusion Systems: Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers and suppliers to build the energy industry of the future. We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world. Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. If that’s you and this role fits, we want to hear from you. Join the power movement as a Senior Subassemblies Specialist The Subassemblies team is responsible for delivering precision, ultra high vacuum subassemblies for seven major teams that go into the SPARC Tokamak. As a Subassemblies Specialist, you will be the last set of hands and eyes on critical parts; as such, meticulous attention to detail in build quality is necessary. You will draw upon your years of technical experience building complex systems to help streamline workflows and deliver the best possible parts. Once all the subassemblies are built (roughly a two year timeline) you will be uniquely qualified to install the subassemblies into the Tokamak and your role will transition to the Assembly of the machine. This role is truly a once in a lifetime opportunity to use hands-on assembly skills to accelerate the development of fusion energy by ensuring SPARC is built on time and to high quality. The main systems you will be building are high power RF antennas, plasma facing components, port plugs, error field correction coils, vertical stability coils and plasma diagnostics; the bespoke tools used for real-time control of a burning plasma and to achieve SPARC's science mission. At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges. We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law. This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws. What you'll do: Build complex and simple subassemblies and components while maintaining all cleanliness specifications Oversee contract technicians; ensuring they are following work instructions and are delivering quality parts Perform testing and check-outs with helium leak checking and various other check-out equipment Work together with scientists and engineers to refine work instructions Help to finalize design of components that interact with the tooling Assist with precision alignment and installation of active and passive optical systems Actively participate in maintaining mandatory cleanliness of work area and clean room Assist other CFS teams with related skilled work Participate in developing strategies to quickly overcome non-conformances encountered in the field What we’re looking for: High school diploma or equivalent experience 5-7 years in a highly technical assembly role; e.g., aerospace/aircraft, racing, semiconductor, oil & gas, laboratory, wind, automotive 2 years leading a team of four people or more Can operate a forklift Experience creating designs for tooling Experience completing large scale projects end to end Ability to use basic machining tools; e.g., lathe/mill Experience using measurement tools Experience using JIRA, Manufacturo, or other software based tracking Experience rigging and lifting heavy components Highly self-motivated, organized, and passionate about their work Bonus points: Welding experience Knowledge of clean room best practices Knowledge of cryogenic systems Knowledge of six sigma process Essential Requirements: Ability to occasionally lift up to 50 lbs Ability to perform activities such as sitting, climbing, stooping, typing, and standing for extended periods of time Willingness to occasionally travel for required nights/weekends/on-call Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics

Full job record

Job ID3d265601fd485a953778f8579361123c82cd76ee
Org IDe3825e08-a702-4b45-890c-2b55d565e966
Source IDbd1d77fb-1ebc-4a7f-932c-220948eab723
Board IDbd1d77fb-1ebc-4a7f-932c-220948eab723
Providerlever
Provider Job Key7ffc3a72-30c9-4b35-8953-0b065e534bbf
TitleSubassemblies Specialist
Normalized Title
Statusactive
Activeyes
Location TextDevens, MA
DepartmentSPARC Tokamak Team
TeamAssembly
Employment TypeFull-time
Workplace Typeon_site
Remote Policy
CountryUnited States
RegionMA
CityDevens
Salary RawUSD 90000-145000 per-year-salary
Salary Min90,000
Salary Max145,000
Salary CurrencyUSD
Salary Periodyear
Source URLhttps://jobs.lever.co/cfsenergy/7ffc3a72-30c9-4b35-8953-0b065e534bbf
Apply URLhttps://jobs.lever.co/cfsenergy/7ffc3a72-30c9-4b35-8953-0b065e534bbf/apply
First Seen At2026-05-29 07:00:47Z
Last Seen At2026-06-06 07:57:25Z
Last Checked At2026-06-06 07:57:25Z
Last Changed At2026-05-29 07:00:47Z
Inactive At
Source Posted At2026-05-11 19:50:31Z
Source Updated At
Raw Payload Uris3://job-postings-prod-raw-590183727216/raw/provider=lever/board=cfsenergy/date=2026-06-06/2026-06-06T07-57-24-495Z-846d95f270dc395d22dd1e99c7403da92d86e75eb6ecf29d7a0769cdc7fa59cc.json
Event Fields
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Parsed Structured
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  "salary_period": "year",
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  "salary_currency": "USD"
}
Extensions
{}
Native Structured
{
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    {
      "text": "What you'll do:",
      "content": "\n<li>Build complex and simple subassemblies and components while maintaining all cleanliness specifications</li>\n<li>Oversee contract technicians; ensuring they are following work instructions and are delivering quality parts</li>\n<li>Perform testing and check-outs with helium leak checking and various other check-out equipment</li>\n<li>Work together with scientists and engineers to refine work instructions</li>\n<li>Help to finalize design of components that interact with the tooling</li>\n<li>Assist with precision alignment and installation of active and passive optical systems</li>\n<li>Actively participate in maintaining mandatory cleanliness of work area and clean room</li>\n<li>Assist other CFS teams with related skilled work</li>\n<li>Participate in developing strategies to quickly overcome non-conformances encountered in the field</li>\n"
    },
    {
      "text": "What we’re looking for:",
      "content": "\n<li>High school diploma or equivalent experience</li>\n<li>5-7 years in a highly technical assembly role; e.g., aerospace/aircraft, racing, semiconductor, oil &amp; gas, laboratory, wind, automotive</li>\n<li>2 years leading a team of four people or more</li>\n<li>Can operate a forklift</li>\n<li>Experience creating designs for tooling&nbsp;</li>\n<li>Experience completing large scale projects end to end</li>\n<li>Ability to use basic machining tools; e.g., lathe/mill</li>\n<li>Experience using measurement tools</li>\n<li>Experience using JIRA, Manufacturo, or other software based tracking</li>\n<li>Experience rigging and lifting heavy components</li>\n<li>Highly self-motivated, organized, and passionate about their work</li>\n"
    },
    {
      "text": "Bonus points: ",
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    },
    {
      "text": "Essential Requirements: ",
      "content": "\n<li>Ability to occasionally lift up to 50 lbs</li>\n<li>Ability to perform activities such as sitting, climbing, stooping, typing, and standing for extended periods of time</li>\n<li>Willingness to occasionally travel for required nights/weekends/on-call</li>\n<li>Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics</li>\n"
    }
  ],
  "country": "US",
  "createdAt": 1778529031515,
  "updatedAt": null,
  "categories": {
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    "location": "Devens, MA",
    "commitment": "Full-time",
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