How many employees work at Commonwealth Fusion Sys?
Commonwealth Fusion Systems LLC has approximately 1,156 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Commonwealth Fusion Sys’s total headcount has grown 76.4% from 655 employees in 2023 to 1,156 in 2026.
Is Commonwealth Fusion Sys hiring right now?
Yes, Commonwealth Fusion Sys is actively hiring. Commonwealth Fusion Sys had 66 active job postings in 2026, a 26.3% decline from 2025 — see job openings & hiring trends.
About Commonwealth Fusion Sys’s Workforce
Commonwealth Fusion Systems LLC is an Energy and Resources company that employs 1,156 people worldwide as of March 2026. It is the 10th-largest by headcount among its peers. Founded in 2017, the company is headquartered in Devens, Massachusetts.
Commonwealth Fusion Sys's workforce has grown 76.4% from 2023 to 2026, though it is down 0.7% year over year in 2026. Its workforce is concentrated most in North America (99.1%), followed by Western Europe (0.5%) and Sub-Saharan Africa (0.3%).
Commonwealth Fusion Sys's functional groups are Finance and Operations (38.5%), Engineering (33.1%), and Sales and Marketing (28.3%), with Finance and Operations growing fastest (up 0.8%). The average salary is $137,976, ranging from a median of $134,000 in North America to $96,000 in Western Europe, up 1.4% year over year in 2026.
Commonwealth Fusion Sys's active job postings fell 26.3% in 2026 to 66, with new postings per month cooling from 60 in 2023 to 25 in 2026. Overall employee sentiment is neutral but declining.
Sourced from Revelio Labs workforce data.
- Headquarters
- Devens, Massachusetts
- Founded
- 2017
- Industry
- Energy and Resources
- Employees
- 1,156
- YoY
- -0.7% (+25)
As of March 2026
Commonwealth Fusion Sys workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Commonwealth Fusion Sys. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsCommonwealth Fusion Sys Annual Employee Count (2023-2026)
- Commonwealth Fusion Sys had 1,156 employees in 2026, a 0.7% decline (+25) from 2025.
- Commonwealth Fusion Sys had 1,165 employees in 2025, a 0.9% decline (+59) from 2024.
- Commonwealth Fusion Sys had 1,106 employees in 2024, a 6.8% increase (+351) from 2023.
- Commonwealth Fusion Sys had 755 employees in 2023, a 2.6% increase (+213) from 2022.
Commonwealth Fusion Sys's total workforce has grown from 655 employees in 2023 to 1,156 in 2026.
Commonwealth Fusion Systems LLC quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 1,156 | +25 | -0.7% |
| 2025 | Q4 | 1,165 | +59 | -0.9% |
| 2025 | Q3 | 1,179 | +145 | +1.3% |
| 2025 | Q2 | 1,164 | +208 | +1.5% |
| 2025 | Q1 | 1,131 | +302 | +3.6% |
| 2024 | Q4 | 1,106 | +351 | +6.8% |
| 2024 | Q3 | 1,034 | +331 | +6.2% |
| 2024 | Q2 | 956 | +301 | +5.2% |
| 2024 | Q1 | 829 | +233 | +4.4% |
| 2023 | Q4 | 755 | +213 | +2.6% |
| 2023 | Q3 | 703 | +228 | +3.1% |
| 2023 | Q2 | 655 | +237 | +5.2% |
See Commonwealth Fusion Sys's complete headcount history, including quarterly breakdowns.
Get the DataCommonwealth Fusion Sys Employee Count by Region (2026)
North America accounts for the largest share of Commonwealth Fusion Sys's global workforce with approximately 99% of total employees, followed by Western Europe and Sub-Saharan Africa.
Commonwealth Fusion Sys employees by region
| Region | Employees | % of Total |
|---|---|---|
| North America | 1,112 | 99.1% |
| Western Europe | 5 | 0.5% |
| Sub-Saharan Africa | 4 | 0.3% |
| Southern Europe | 1 | 0.1% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataCommonwealth Fusion Sys Employee Count by Department (2026)
Commonwealth Fusion Sys's employee groups are Finance and Operations (38.5%), Engineering (33.1%), and Sales and Marketing (28.3%).
Commonwealth Fusion Sys employees by department
| Department | Employees | % of Total |
|---|---|---|
| Finance and Operations | 445 | 38.5% |
| Engineering | 383 | 33.1% |
| Sales and Marketing | 327 | 28.3% |
Compare Commonwealth Fusion Sys's department mix to industry peers.
See Full DataCommonwealth Fusion Sys Employee Salary by Region (2026)
Commonwealth Fusion Sys's average employee salary is $137,976 globally. Employees in North America receive the highest compensation. Pay is lowest in Western Europe, at a median of $96,000.
Commonwealth Fusion Sys median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| North America | $134,000 |
| Western Europe | $96,000 |
Unlock salary by role, level, and city — and compare to Commonwealth Fusion Sys's industry peers.
Unlock Salary DataCommonwealth Fusion Sys Job Openings and Hiring Trends (2023-2026)
- Commonwealth Fusion Sys had 66 active job postings in 2026, a 26.3% decline (-20) from 2025.
- Commonwealth Fusion Sys had 86 active job postings in 2025, a 65.6% decline (-84) from 2024.
- Commonwealth Fusion Sys had 170 active job postings in 2024, a 50.9% increase (+69) from 2023.
- Commonwealth Fusion Sys had 101 active job postings in 2023, a 35.8% decline from 2022.
- Hiring velocity in 2026: 25 new roles/month, down from 40 in 2025 and 65 in 2024.
Commonwealth Fusion Sys's hiring is slowing: active job postings fell 26.3% in 2026 to 66, with new postings per month cooling from 60 in 2023 to 25 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataCommonwealth Fusion Sys Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across Commonwealth Fusion Sys's workforce based on public professional data. Overall sentiment is neutral and has declined year over year in 2026.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
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Frequently Asked Questions About Commonwealth Fusion Sys
- How fast is Commonwealth Fusion Sys growing?
- In 2026, Commonwealth Fusion Sys's headcount shrank 0.7% to 1,156 employees, up from 1,131 in 2025.
- See the full headcount history
- Where are Commonwealth Fusion Sys employees located?
- Most Commonwealth Fusion Sys employees are based in North America (99.1% of headcount), followed by Western Europe and Sub-Saharan Africa.
- Explore where the workforce is based
- What is the average salary at Commonwealth Fusion Sys?
- The average employee salary at Commonwealth Fusion Sys is approximately $138k per year.
- Analyze the salary distribution
- How many new job postings does Commonwealth Fusion Sys open per year?
- In Q1 2026, Commonwealth Fusion Sys opened 76 new job postings. In 2025, Commonwealth Fusion Sys opened 479 new job postings — about 40 per month.
- Track hiring trends by role
- When was Commonwealth Fusion Sys founded and where is it headquartered?
- Commonwealth Fusion Sys was founded in 2017 and is headquartered in Devens, Massachusetts.
- Compare Commonwealth Fusion Sys to industry peers
Speak with a workforce expert about Commonwealth Fusion Sys.
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