Data as of 2026-06-04
vs 
Commonwealth Fusion Systems vs Span
Hiring comparison for two climate-tech companies. Commonwealth Fusion Systems shows the larger live hiring footprint with 109 active roles, compared with 34 at Span. Commonwealth Fusion Systems spans 6 tracked job locations while Span spans 3. Commonwealth Fusion Systems lists 2 remote-friendly roles; Span lists 9.
Commonwealth Fusion Systems roles
Span roles
Combined locations
Combined remote
Last refreshed
Side-by-side data
| Metric | Commonwealth Fusion Systems | Span |
|---|---|---|
| HQ | Devens, US | San Francisco, US |
| Website | cfs.energy | span.io |
| ATS | lever | ashby |
| Open roles | 109 | 34 |
| Tracked locations | 6 | 3 |
| Remote-friendly roles | 2 | 9 |
| Onsite roles | 98 | 0 |
| Newest posting | 2026-06-03 | Not dated |
| Top role mix | Manufacturing 40, Engineering 24, Other 24 | Engineering 19, Sales 4, Operations 2 |
| Top locations | Devens, MA, Somerville, MA, Milpitas, CA, Devens, MA & Richmond, VA | Bengaluru, San Francisco, Remote |
What differs
Commonwealth Fusion Systems is headquartered in Devens, US and uses lever for its current openings. Its tracked hiring mix is led by Manufacturing 40, Engineering 24, Other 24, with recent roles spread across Devens, MA, Somerville, MA, Milpitas, CA, Devens, MA & Richmond, VA. Span is headquartered in San Francisco, US and uses ashby. Its tracked hiring mix is led by Engineering 19, Sales 4, Operations 2, with recent roles spread across Bengaluru, San Francisco, Remote.
This comparison is based on live public ATS data rather than employer claims. The strongest difference today is hiring volume: Commonwealth Fusion Systems has 109 active roles and Span has 34. Remote availability also differs, with 2 remote-friendly roles at Commonwealth Fusion Systems and 9 at Span. Use the company pages below to inspect every posting before applying through the original employer ATS.
Latest Commonwealth Fusion Systems roles
- Lead Assembly Technician - Third Shift Devens, MA · onsite · posted 2026-06-03
- Lead Assembly Technician - Second Shift Devens, MA · onsite · posted 2026-06-03
- Fiber Optic Specialist Somerville, MA · onsite · posted 2026-06-03
- Senior Manager, Manufacturing Engineering Devens, MA · onsite · posted 2026-06-02
- Production Technician Supervisor - First Shift Devens, MA · onsite · posted 2026-06-02
- Buyer Devens, MA · hybrid · posted 2026-06-01
Latest Span roles
- Senior Utility Channel Marketing Manager San Francisco
- Senior NPI Engineer San Francisco
- Staff Software Engineer: Embedded Device Software San Francisco
- Sales Operations Specialist Bengaluru
- Sr. Firmware Technical Program Manager San Francisco
- Device Software Engineer, Gateway/Embedded Linux San Francisco
Other comparisons
- Aerones vs Commonwealth Fusion Systems · 141 combined open roles
- Antora Energy vs Commonwealth Fusion Systems · 141 combined open roles
- Commonwealth Fusion Systems vs Curri · 141 combined open roles
- Commonwealth Fusion Systems vs Gridware · 146 combined open roles
- Astro Mechanica vs Commonwealth Fusion Systems · 147 combined open roles
FAQ
- Who is hiring more — Commonwealth Fusion Systems or Span?
- Commonwealth Fusion Systems has more open roles (109) than Span (34) as of 2026-06-04.
- Where do Commonwealth Fusion Systems and Span overlap geographically?
- Commonwealth Fusion Systems HQ: Devens, US; Span HQ: San Francisco, US. Commonwealth Fusion Systems hires across Devens, MA, Somerville, MA, Milpitas, CA, Devens, MA & Richmond, VA. Span hires across Bengaluru, San Francisco, Remote.
- Which is more remote-friendly?
- Commonwealth Fusion Systems lists 2 remote-friendly roles (2% of openings); Span lists 9 (26%). Counts are from each employer's ATS workplace_type field.
- Which roles are most active at Commonwealth Fusion Systems and Span?
- Commonwealth Fusion Systems: Manufacturing 40, Engineering 24, Other 24. Span: Engineering 19, Sales 4, Operations 2.
- How fresh is this comparison?
- Refreshed 2026-06-04. Jobs are pulled from each company's public ATS API (Greenhouse / Lever / Ashby / Workable / SmartRecruiters / Recruitee) on a daily cron. Climate Job Radar is not affiliated with either company.
Related
Source: Job listings from each company's public ATS API (Greenhouse / Lever / Ashby / Workable / SmartRecruiters / Recruitee), refreshed daily. Last refreshed 2026-06-04.