How many employees work at ESO?
Electricity System Operator EAD has approximately 884 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. ESO’s total headcount has grown 5.5% from 838 employees in 2023 to 884 in 2026.
About ESO’s Workforce
Electricity System Operator EAD is an Energy and Resources company that employs 884 people worldwide as of March 2026. It is the 4th-largest by headcount among its peers. Founded in 2007, the company is headquartered in Sofia, Bulgaria.
ESO's workforce has grown 5.5% from 2023 to 2026, up 1.2% year over year in 2026. It fell to a low of 825 in 2023 Q3 before recovering. Its workforce is concentrated most in Eastern Europe (99.3%), followed by Sub-Saharan Africa (0.7%) and North America (0.1%).
ESO's functional groups are Engineering (51.4%), Finance and Operations (35.2%), and Sales and Marketing (13.4%). The average salary is $22,404, highest in Eastern Europe at a median of $20,000, down 1.8% year over year in 2026.
Overall employee sentiment is positive and broadly stable.
Sourced from Revelio Labs workforce data.
- Headquarters
- Sofia, Bulgaria
- Founded
- 2007
- Industry
- Energy and Resources
- Employees
- 884
- YoY
- +1.2% (+21)
As of March 2026
ESO workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for ESO. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsESO Annual Employee Count (2023-2026)
- ESO had 884 employees in 2026, a 1.2% increase (+21) from 2025.
- ESO had 872 employees in 2025, a 0.8% increase (+19) from 2024.
- ESO had 853 employees in 2024, a 0.7% decline (+19) from 2023.
- ESO had 834 employees in 2023, a 0.8% increase (+15) from 2022.
ESO's total workforce has grown from 838 employees in 2023 to 884 in 2026.
Electricity System Operator EAD quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 884 | +21 | +1.2% |
| 2025 | Q4 | 872 | +19 | +0.8% |
| 2025 | Q3 | 892 | +54 | +2.5% |
| 2025 | Q2 | 876 | +40 | +1.3% |
| 2025 | Q1 | 863 | +36 | +0.1% |
| 2024 | Q4 | 853 | +19 | -0.7% |
| 2024 | Q3 | 838 | +13 | -1.1% |
| 2024 | Q2 | 836 | -2 | -0.4% |
| 2024 | Q1 | 827 | -4 | +0.9% |
| 2023 | Q4 | 834 | +15 | +0.8% |
| 2023 | Q3 | 825 | +28 | +2.2% |
| 2023 | Q2 | 838 | +32 | +1.7% |
See ESO's complete headcount history, including quarterly breakdowns.
Get the DataESO Employee Count by Region (2026)
Eastern Europe accounts for the largest share of ESO's global workforce with approximately 99% of total employees, followed by Sub-Saharan Africa and North America.
ESO employees by region
| Region | Employees | % of Total |
|---|---|---|
| Eastern Europe | 876 | 99.3% |
| Sub-Saharan Africa | 6 | 0.7% |
| North America | 1 | 0.1% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataESO Employee Count by Department (2026)
ESO's employee groups are Engineering (51.4%), Finance and Operations (35.2%), and Sales and Marketing (13.4%).
ESO employees by department
| Department | Employees | % of Total |
|---|---|---|
| Engineering | 455 | 51.4% |
| Finance and Operations | 312 | 35.2% |
| Sales and Marketing | 118 | 13.4% |
Compare ESO's department mix to industry peers.
See Full DataESO Employee Salary by Region (2026)
ESO's average employee salary is $22,404 globally. Employees in Eastern Europe receive the highest compensation.
ESO median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| Eastern Europe | $20,000 |
Unlock salary by role, level, and city — and compare to ESO's industry peers.
Unlock Salary DataESO Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across ESO's workforce based on public professional data. Overall sentiment is positive and has held steady year over year in 2026.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
Unlock SentimentSimilar Companies
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Frequently Asked Questions About ESO
- How fast is ESO growing?
- In 2026, ESO's headcount grew 1.2% to 884 employees, up from 863 in 2025.
- See the full headcount history
- Where are ESO employees located?
- Most ESO employees are based in Eastern Europe (99.3% of headcount), followed by Sub-Saharan Africa and North America.
- Explore where the workforce is based
- What is the average salary at ESO?
- The average employee salary at ESO is approximately $22.4k per year.
- Analyze the salary distribution
- When was ESO founded and where is it headquartered?
- ESO was founded in 2007 and is headquartered in Sofia, Bulgaria.
- Compare ESO to industry peers
Speak with a workforce expert about ESO.
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