How many employees work at Sero?
Sero Technologies Ltd. has approximately 108 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Sero’s total headcount has declined 17.1% from 130 employees in 2023 to 108 in 2026.
Is Sero hiring right now?
Yes, Sero is actively hiring. Sero had 3 active job postings in 2026, a 114.3% decline from 2025 — see job openings & hiring trends.
About Sero’s Workforce
Sero Technologies Ltd. is an Energy and Resources company that employs 108 people worldwide as of March 2026. It is the 6th-largest by headcount among its peers. Founded in 2017, the company is headquartered in Cardiff, United Kingdom.
Sero's workforce has declined 17.1% from 2023 to 2026, though it is up 1.5% year over year in 2026. It fell to a low of 94 in 2024 Q2 before recovering. Its workforce is concentrated most in Northern Europe (85.8%), followed by South Asia (5.1%) and South America (3.1%).
Sero's functional groups are Engineering (43.2%), Finance and Operations (35.4%), and Sales and Marketing (21.4%), with Engineering growing fastest (up 7.5%). The average salary is $68,578, highest in Northern Europe at a median of $64,000, down 13.4% year over year in 2026.
Sero's active job postings fell 114.3% in 2026 to 3, with new postings per month cooling from 18 in 2023 to 3 in 2026. Overall employee sentiment is negative but improving.
Sourced from Revelio Labs workforce data.
- Headquarters
- Cardiff, United Kingdom
- Founded
- 2017
- Industry
- Energy and Resources
- Employees
- 108
- YoY
- +1.5% (+4)
As of March 2026
Sero workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Sero. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsSero Annual Employee Count (2023-2026)
- Sero had 108 employees in 2026, a 1.5% increase (+4) from 2025.
- Sero had 112 employees in 2025, a 1.4% increase (+8) from 2024.
- Sero had 104 employees in 2024, a 1.2% decline (-16) from 2023.
- Sero had 120 employees in 2023, a 2.5% decline (-4) from 2022.
Sero's total workforce has grown from 94 employees in 2024 to 108 in 2026. Sero's headcount peaked at 130 in 2023 before declining in 2024 and recovering through 2025 and 2026.
Sero Technologies Ltd. quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 108 | +4 | +1.5% |
| 2025 | Q4 | 112 | +8 | +1.4% |
| 2025 | Q3 | 111 | +12 | +6.1% |
| 2025 | Q2 | 104 | +10 | +3.2% |
| 2025 | Q1 | 104 | -1 | +0.1% |
| 2024 | Q4 | 104 | -16 | -1.2% |
| 2024 | Q3 | 99 | -28 | -7.0% |
| 2024 | Q2 | 94 | -36 | -11.4% |
| 2024 | Q1 | 105 | -14 | -6.6% |
| 2023 | Q4 | 120 | -4 | -2.5% |
| 2023 | Q3 | 127 | +15 | +0.5% |
| 2023 | Q2 | 130 | +22 | +3.0% |
See Sero's complete headcount history, including quarterly breakdowns.
Get the DataSero Employee Count by Region (2026)
Northern Europe accounts for the largest share of Sero's global workforce with approximately 86% of total employees, followed by South Asia and South America.
Sero employees by region
| Region | Employees | % of Total |
|---|---|---|
| Northern Europe | 92 | 85.8% |
| South Asia | 5 | 5.1% |
| South America | 3 | 3.1% |
| Central and Western Asia | 3 | 2.5% |
| Arab States | 2 | 2.1% |
| North America | 1 | 1.4% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataSero Employee Count by Department (2026)
Sero's employee groups are Engineering (43.2%), Finance and Operations (35.4%), and Sales and Marketing (21.4%).
Sero employees by department
| Department | Employees | % of Total |
|---|---|---|
| Engineering | 46 | 43.2% |
| Finance and Operations | 37 | 35.4% |
| Sales and Marketing | 22 | 21.4% |
Compare Sero's department mix to industry peers.
See Full DataSero Employee Salary by Region (2026)
Sero's average employee salary is $68,578 globally. Employees in Northern Europe receive the highest compensation.
Sero median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| Northern Europe | $64,000 |
Unlock salary by role, level, and city — and compare to Sero's industry peers.
Unlock Salary DataSero Job Openings and Hiring Trends (2023-2026)
- Sero had 3 active job postings in 2026, a 114.3% decline (+3) from 2025.
- Sero had 0 active job postings in 2025, a 200.0% decline (-8) from 2024.
- Sero had 8 active job postings in 2024, a 139.6% decline (-37) from 2023.
- Sero had 45 active job postings in 2023, a 167.3% increase from 2022.
- Hiring velocity in 2026: 3 new roles/month, down from 4 in 2025 and 8 in 2024.
Sero's hiring is slowing: active job postings fell 114.3% in 2026 to 3, with new postings per month cooling from 18 in 2023 to 3 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataSero Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across Sero's workforce based on public professional data. Overall sentiment is negative and has improved 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 Sero
- How fast is Sero growing?
- In 2026, Sero's headcount grew 1.5% to 108 employees, up from 104 in 2025.
- See the full headcount history
- Where are Sero employees located?
- Most Sero employees are based in Northern Europe (85.8% of headcount), followed by South Asia and South America.
- Explore where the workforce is based
- What is the average salary at Sero?
- The average employee salary at Sero is approximately $68.6k per year.
- Analyze the salary distribution
- How many new job postings does Sero open per year?
- In Q1 2026, Sero opened 10 new job postings. In 2025, Sero opened 51 new job postings — about 4 per month.
- Track hiring trends by role
- When was Sero founded and where is it headquartered?
- Sero was founded in 2017 and is headquartered in Cardiff, United Kingdom.
- Compare Sero to industry peers
Speak with a workforce expert about Sero.
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