{"id":2992680,"url":"https://alion.io/job/commonwealth-fusion-systems-subassemblies-specialist","title":"Subassemblies Specialist","company":{"id":8705,"name":"Commonwealth Fusion Systems","domain":"cfs.energy","url":"https://alion.io/company/commonwealth-fusion-systems","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":80,"open_postings":5,"ghost_share":0,"stale_share":0.8,"repost_share":0,"time_to_fill_p50_days":50,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Energy","role_family":"Energy","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Devens, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":90000,"max":145000,"currency":"USD","period":"year","gross":null,"usd_annual":145000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-09-30T21:44:16Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-11-09T05:42:04Z","board_verified":true,"closed_at":null,"days_open":39,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":39},"description":"Join the power movement as a Subassemblies Specialist\nThe 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.\nWhat you'll do:\nBuild complex and simple subassemblies and components while maintaining all cleanliness specifications\nOversee contract technicians; ensuring they are following work instructions and are delivering quality parts\nPerform testing and check-outs with helium leak checking and various other check-out equipment\nWork together with scientists and engineers to refine work instructions\nHelp to finalize design of components that interact with the tooling\nAssist with precision alignment and installation of active and passive optical systems\nActively participate in maintaining mandatory cleanliness of work area and clean room\nAssist other CFS teams with related skilled work\nParticipate in developing strategies to quickly overcome non-conformances encountered in the field\nWhat we’re looking for:\nHigh school diploma or equivalent experience\n5-7 years in a highly technical assembly role; e.g., aerospace/aircraft, racing, semiconductor, oil & gas, laboratory, wind, automotive\n2 years leading a team of four people or more\nCan operate a forklift\nExperience creating designs for tooling \nExperience completing large scale projects end to end\nAbility to use basic machining tools; e.g., lathe/mill\nExperience using measurement tools\nExperience using JIRA, Manufacturo, or other software based tracking\nExperience rigging and lifting heavy components\nHighly self-motivated, organized, and passionate about their work\nBonus points:\nWelding experience\nKnowledge of clean room best practices\nKnowledge of cryogenic systems\nKnowledge of six sigma process\nEssential Requirements:\nAbility to occasionally lift up to 50 lbs\nAbility to perform activities such as sitting, climbing, stooping, typing, and standing for extended periods of time\nWillingness to occasionally travel for required nights/weekends/on-call\nDedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics","description_format":"text","description_chars":3160,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"high_school","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Nuclear Energy","Nuclear Engineering"],"lifecycle":[{"event":"open","at":"2026-10-21T10:24:22Z"}],"visa":[],"liveness":{"score":60,"band":"ok","label":"Likely open","p_open":1,"p_active":0.806,"p_room":0.75,"age_days":39,"expected_fill_days":50,"reasons":["conf:0","velocity","win:late","comp:brand"],"computed_at":"2026-11-09T06:03:00Z"},"pay":{"stated_usd_annual":145000,"is_top_pay":true},"html_url":"https://alion.io/job/commonwealth-fusion-systems-subassemblies-specialist","json_url":"https://alion.io/job/commonwealth-fusion-systems-subassemblies-specialist.json","meta":{"generated_at":"2026-11-09T09:59:57Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":10150,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":8705},"rest":"https://alion.io/mcp/rest/get_company?id=8705"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcommonwealth-fusion-systems-subassemblies-specialist"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcommonwealth-fusion-systems-subassemblies-specialist"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcommonwealth-fusion-systems-subassemblies-specialist"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/commonwealth-fusion-systems-subassemblies-specialist\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcommonwealth-fusion-systems-subassemblies-specialist"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2992680}},{"tool":"search_jobs","arguments":{"company":"cfs.energy","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2992680},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); 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