How many employees work at Commonwealth Fusion Sys?
Commonwealth Fusion Systems LLC has 1,116 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 8.1%.
Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025
About Commonwealth Fusion Sys
Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy. CFS is collaborating with MIT to leverage decades of research combined with new groundbreaking high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost. CFS is now building SPARC, the world's first commercially relevant, net energy fusion demonstration device. SPARC will pave the way for the first fusion power plant, ARC, that will produce power on the grid. The ultimate mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. CFS has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by the world’s leading investors, CFS is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. If you are interested in joining our team, check out cfs.energy/careers for more information.
As of December 2025
Commonwealth Fusion Sys
workforce metrics
Headcount
1.1k
Avg. Salary
$138.6k
Tenure
1.9yr
Growth Rate
8.1%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of Commonwealth Fusion Sys annual worldwide employee count from 2023 to 2025.
- Commonwealth Fusion Sys total number of employees in 2025 was 1,116, a 8.1% increase from 2024.
- Commonwealth Fusion Sys total number of employees in 2024 was 1,029, a 36.2% increase from 2023.
- Commonwealth Fusion Sys total number of employees in 2023 was 714, a 30.9% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of Commonwealth Fusion Sys annual active job postings from 2023 to 2025.
- Commonwealth Fusion Sys active job postings in 2025 was 86, a 65.6% decline from 2024.
- Commonwealth Fusion Sys active job postings in 2024 was 170, a 50.9% increase from 2023.
- Commonwealth Fusion Sys active job postings in 2023 was 101, a 35.1% decline from 2022.
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Employee Sentiment
Sentiment Topics
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