Commonwealth Fusion Systems careers
Commonwealth Fusion Systems has 127 open US roles on applinity as of October 26, 2026, with 6 US postings first seen in the last 7 days. Across all postings, the locations listed most often are Devens, MA (104); Milpitas, CA (11); Somerville, MA (8). The largest hiring areas are Corporate Operations (40); R&D (20); Engineering (19). Listings come direct from Commonwealth Fusion Systems' careers site, not from an aggregator.
Total open postings
127
Hiring intensity
—
open jobs per 1k employees
Headcount
—
Hiring pulse · last 90 days
6 new reqs this week
Open-jobs trend — direct from Commonwealth Fusion Systems's career site, refreshed daily.
Stealth signals
Patterns detected over the last 60 days of Commonwealth Fusion Systems postings.37 new Mechanical & Mfg Engineering postings in the last 14 days.
33 new Operations & Supply Chain postings in the last 14 days.
17 new Other postings in the last 14 days.
13 new Engineering postings in the last 14 days.
8 new Finance & Accounting postings in the last 14 days.
8 new QA & Test postings in the last 14 days.
Top hiring areas
- Corporate Operations40
- R&D20
- Engineering19
- SPARC Tokamak Team15
- Internships11
- Finance7
Top locations
- Devens, MA104
- Milpitas, CA11
- Somerville, MA8
- Devens, MA & Richmond, VA3
- Ayer, MA1
Open roles by function
Jump straight to Commonwealth Fusion Systems's open roles in a specific function — comp, location, and posting age on every listing.
How to apply to Commonwealth Fusion Systems
How do I apply to Commonwealth Fusion Systems?
Commonwealth Fusion Systems takes applications through Lever. Lever applications are usually a single form: résumé upload, contact details, and any role-specific questions. Open a listing on this page to read the full description, then follow the link to the original posting on Commonwealth Fusion Systems' careers site to submit. applinity can tailor your résumé to that job description before you apply.
How many open roles does Commonwealth Fusion Systems have?
Commonwealth Fusion Systems has 127 open US roles on applinity as of October 26, 2026, with 6 US postings first seen in the last 7 days. The counts come from Commonwealth Fusion Systems' own careers site. applinity lists the US postings.
Where is Commonwealth Fusion Systems hiring?
Across every posting on Commonwealth Fusion Systems' careers site, the locations listed most often are Devens, MA (104); Milpitas, CA (11); Somerville, MA (8); Devens, MA & Richmond, VA (3); Ayer, MA (1). Location names are the ones Commonwealth Fusion Systems uses on its postings.
Which teams at Commonwealth Fusion Systems are hiring?
Across every posting on Commonwealth Fusion Systems' careers site, the largest hiring areas are Corporate Operations (40); R&D (20); Engineering (19); SPARC Tokamak Team (15); Internships (11).
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Recently posted at Commonwealth Fusion Systems
showing 30 of 127 open in the US- Intern - Materials Test Engineer - Summer 2027Devens, MA · Internships
- Fiber Optic Specialist - First ShiftSomerville, MA · Corporate Operations
- Treasury and Tax AnalystDevens, MA · Finance
- Technical Accounting and Internal Controls LeadDevens, MA · Finance
- Accounts Payable SpecialistDevens, MA · Finance
- Materials Test Operator - ContractDevens, MA · R&D
- Staff OT/IT Support EngineerMilpitas, CA · Corporate Operations
- Senior Mechanical EngineerMilpitas, CA · Superconductor
- Field Assembly ManagerDevens, MA · SPARC Tokamak Team
- Intern - AI & Infrastructure Engineer - Spring 2027Devens, MA · Internships
- Intern - Nuclear Engineer - Summer 2027Devens, MA · Internships
- Intern - Assembly Technical Project Manager - Spring 2027Devens, MA · Internships
- Intern - Mechanical Engineer - Summer 2027Milpitas, CA · Internships
- Intern - Controls Engineer - Summer 2027Milpitas, CA · Internships
- Intern - Mechanical Equipment Engineer - Spring 2027Devens, MA · Internships
- Intern - Health Physics - Spring or Summer 2027Devens, MA · Internships
- Molten Salt EngineerDevens, MA · R&D
- Techno-Economic AnalystDevens, MA · Business
- Senior Controls EngineerDevens, MA · Corporate Operations
- Enterprise Systems AdministratorDevens, MA · Corporate Operations
- Principal Mechanical Engineer - Web HandlingMilpitas, CA · Superconductor
- Senior Computational Materials ScientistDevens, MA · R&D
- Environmental, Health & Safety TechnicianDevens, MA · Corporate Operations
- Intern - Nuclear/Systems Engineer - Summer 2027Devens, MA · Internships
- Intern - Industrial Engineer - Spring or Summer 2027Devens, MA · Internships
- Intern - Manufacturing Engineer - Spring or Summer 2027Devens, MA · Internships
- Assembly Test Implementation EngineerDevens, MA · SPARC Tokamak Team
- Equipment TechnicianMilpitas, CA · Superconductor
- Senior Enterprise Solution ArchitectMilpitas, CA · Corporate Operations
- Controls EngineerDevens, MA · Corporate Operations
See all 127 open Commonwealth Fusion Systems roles in the US — a free account scores every match against your résumé.