Commonwealth Fusion Systems
Hiring · 108 open jobsGeneral information
Commonwealth Fusion Systems is the world's largest company building commercial fusion energy machines. SPARC is its machine designed to become the first fusion device to produce net energy. ARC is the power plant it plans to build next, meant to turn that fusion reaction into electricity for the grid. The company is based in Devens, Massachusetts.
Commonwealth Fusion Systems started in 2018 as a spin-off from MIT. It has grown fast, from about 350 employees in late 2022 to more than 1,000 by 2025. That growth is funded by large investors: the company raised $1.8 billion in 2021 and another $1 billion in 2026. For engineers, that means real money behind a technology still years from selling power commercially.
Currently, there's a total of 79 job openings at Commonwealth Fusion Systems. Over the last 30 days, 64 jobs were added and 19 were removed (job postings usually stay up ~14 days before being removed). Commonwealth Fusion Systems is an H-1B sponsor.1
Hiring activity
New jobs added per week2
View these weekly figures as a table
| Week beginning | New listings |
|---|---|
| July 20, 2026 | 3 |
| July 27, 2026 | 1 |
| August 3, 2026 | 8 |
| August 10, 2026 | 29 |
| August 17, 2026 | 12 |
| August 24, 2026 | 15 |
| August 31, 2026 | 18 |
| September 7, 2026 (in progress) | 14 |
Open jobs
108 open · updated todayPage 1 of 6, most recently added first · Download (CSV)3
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Score your CV for free before you applyVisa sponsorship
Does Commonwealth Fusion Systems sponsor visas? Using USCIS data, we've collected the number of H-1Bs granted from 2021 to 2023. Commonwealth Fusion Systems is a likely employer for applicants who require sponsorship.4
Visa petitions approved each year (USCIS)4
| Fiscal year | Approved |
|---|---|
| FY2021 | 0 |
| FY2022 | 2 |
| FY2023 | 0 |
Based on public USCIS and Department of Labor records. Past filings do not guarantee future sponsorship. Browse all H1B sponsors →
Similar companies
Common questions
Is Commonwealth Fusion Systems hiring now?
Yes. There are 108 open jobs, with 86 added in the last 30 days. They close fast though, often within 14 days, so don't wait.
Does Commonwealth Fusion Systems sponsor H-1B visas?
Yes. Government records show 2 approved petitions from FY2021 to FY2023.
Interview OS
Company pages built from daily checks of real hiring systems.
Notes & sources
- 1. Company description. Written by InterviewOS from Commonwealth Fusion Systems's public materials and press coverage; facts are checked against the sources below.
- 2. Weekly counts. A count is the number of listings the pipeline saw for the first time in that week. Weeks begin Monday; the onboarding week is excluded from the scale and every average.
- 3. Live counts. Deduplicated live listings observed daily on Commonwealth Fusion Systems's own hiring system; last check September 12, 2026. Stale and syndicated posts on aggregator sites are not counted.
- 4. Federal visa records. USCIS H1B Employer Data Hub and US Department of Labor LCA disclosure files, matched to this company by name.
Sources
cfs.energy, checked daily
USCIS H-1B Employer Data Hub
US Department of Labor LCA disclosure files
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