How many employees work at Costain Group?
Costain Group Plc (COST) has approximately 2,807 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Costain Group's total headcount has grown 7.2% from 2,619 employees in 2023 to 2,807 in 2026.
Data source: Revelio LabsCoverage: Global workforce, 2023–2026Published July 2026
Is Costain Group hiring right now?
Yes, Costain Group is actively hiring. Costain Group had 404 active job postings in 2026, a 56.1% increase from 2025 — see job openings & hiring trends.
About Costain Group's Workforce
Costain Group Plc (COST) is an Engineering and Construction Services company that employs 2,807 people worldwide as of March 2026. It is the 11th-largest by headcount among its peers. Founded in 1978, the company is headquartered in London, United Kingdom and trades on the London Stock Exchange.
Costain Group's workforce has grown 7.2% from 2023 to 2026, with headcount up 11.4% year over year in 2026. The staff count reached a low of 2,504 in 2025 Q1 before recovering, and the group remains concentrated in the United Kingdom (94.9%), with the United States at 1.7% and Nigeria at 0.9%; the United States is the fastest-growing location, up 25.8%.
Costain Group's largest functional groups are Finance and Operations (46.8%), Engineering (30.2%), and Sales and Marketing (23.0%), with Engineering growing fastest (up 10.3%). The average tenure is 3.8 years, and the average salary across all employees is $83,712, with regional medians ranging from $108,000 in Northern America to $11,000 in Southern Asia.
Costain Group's active job postings rose 56.1% in 2026 to 404, with postings per month shown to be 213 in 2023, 207 in 2024, 159 in 2025, and 179 in 2026. Overall employee sentiment is neutral but declining.
Sourced from Revelio Labs workforce data.
As of March 2026
Costain Group
workforce metrics
Headcount
2.8k
11.4% YoY
Avg. Salary
$83.7k
1.1% YoY
Tenure
3.8yr
0.7yr YoY
Growth Rate
11.4%
12.3pts YoY
Hiring Rate
Attrition Rate
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Costain Group. Compare to peers, export the dataset, and access the full quarterly history.
- Costain Group had 2,807 employees in 2026, a 11.4% increase (+303) from 2025.
- Costain Group had 2,656 employees in 2025, a 5.6% increase (+144) from 2024.
- Costain Group had 2,512 employees in 2024, a 1.6% decline (-40) from 2023.
- Costain Group had 2,552 employees in 2023, a 3.4% decline (-88) from 2022.
Costain Group's total workforce has grown from 2,619 employees in 2023 to 2,807 in 2026.
Costain Group Plc — quarterly employee count (2023–2026)
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 2,807 | +303 | +11.4% |
| 2025 | Q4 | 2,656 | +144 | +5.6% |
| 2025 | Q3 | 2,615 | +91 | +3.5% |
| 2025 | Q2 | 2,526 | -8 | -0.3% |
| 2025 | Q1 | 2,504 | -22 | -0.9% |
| 2024 | Q4 | 2,512 | -40 | -1.6% |
| 2024 | Q3 | 2,524 | -59 | -2.3% |
| 2024 | Q2 | 2,534 | -85 | -3.3% |
| 2024 | Q1 | 2,526 | -109 | -4.2% |
| 2023 | Q4 | 2,552 | -88 | -3.4% |
| 2023 | Q3 | 2,583 | -77 | -2.9% |
| 2023 | Q2 | 2,619 | -19 | -0.7% |
Want to see Costain Group's complete headcount history back to 2008, including quarterly breakdowns?
The United Kingdom accounts for the largest share of Costain Group's global workforce with approximately 95% of total employees, followed by the United States and Nigeria. Costain Group's headcount in the United States is growing fastest among its major locations, up 25.8% year over year in 2026.
Costain Group employees by country — 2026
| Country | Employees | % of Total | YoY % |
|---|---|---|---|
| United Kingdom | 2,664 | 94.9% | +7.9% |
| United States | 47 | 1.7% | +25.8% |
| Nigeria | 25 | 0.9% | -2.9% |
| United Arab Emirates | 17 | 0.6% | +0.0% |
| India | 6 | 0.2% | +12.1% |
| Ireland | 5 | 0.2% | +0.0% |
| Australia | 5 | 0.2% | +0.0% |
| Spain | 4 | 0.1% | +0.0% |
| Canada | 3 | 0.1% | +18.7% |
| Zimbabwe | 2 | 0.1% | +0.0% |
Drill into city-level data, hiring trends by region and historic geographic shifts
Costain Group's largest employee groups are Finance and Operations (46.8%), Engineering (30.2%), and Sales and Marketing (23.0%).
Costain Group employees by department — 2026
| Department | Employees | % of Total | YoY % |
|---|---|---|---|
| Finance and Operations | 1,355 | 46.8% | +7.0% |
| Engineering | 873 | 30.2% | +10.3% |
| Sales and Marketing | 667 | 23.0% | +7.0% |
Compare Costain Group's department mix to industry peers.
Costain Group's average employee salary is $83,712 globally. Employees in Northern America receive the highest compensation, with median pay approximately 1.3x the global average. Pay is lowest in Southern Asia, at a median of $11,000.
Costain Group median employee salary by region — 2026 (USD)
| Region | Median Salary |
|---|---|
| Northern America | $108,000 |
| Eastern Asia | $97,000 |
| Pacific Islands | $96,000 |
| Central America and the Caribbean | $81,000 |
| Northern Europe | $75,000 |
| Western Europe | $73,000 |
| Arab States | $64,000 |
| Eastern Europe | $37,000 |
| Southern Europe | $28,000 |
| Sub-Saharan Africa | $12,000 |
| Southern America | $12,000 |
| South-Eastern Asia | $11,000 |
| Southern Asia | $11,000 |
| Northern Africa | $7,000 |
Unlock salary by role, level, and city — and compare to Costain Group's industry peers.
- Costain Group had 404 active job postings in 2026, a 56.1% increase (+161) from 2025.
- Costain Group had 243 active job postings in 2025, a 2.4% decline (-6) from 2024.
- Costain Group had 249 active job postings in 2024, a 0.8% decline (-2) from 2023.
- Costain Group had 251 active job postings in 2023, a 21.4% decline from 2022.
- Hiring velocity in 2026: 179 new roles/month, up from 159 in 2025 and 207 in 2024. New metric
Costain Group's active job postings rose 56.1% in 2026 to 404, with new postings per month cooling from 213 in 2023 to 179 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Revelio Labs tracks employee sentiment across Costain Group'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.
Similar Engineering and Construction Services Companies by Employee Count
- How fast is Costain Group growing?
- In 2026, Costain Group's headcount grew 11.4% to 2,807 employees, up from 2,504 in 2025.
- Where are Costain Group employees located?
- Most Costain Group employees are based in the United Kingdom (94.9% of headcount), followed by the United States and Nigeria.
- What is the average salary at Costain Group?
- The average employee salary at Costain Group is approximately $83.7k per year.
- How many people does Costain Group hire per year?
- In 2026, Costain Group opened roughly 2,148 new roles — about 179 per month.
- When was Costain Group founded and where is it headquartered?
- Costain Group was founded in 1978 and is headquartered in London, United Kingdom.
See something that doesn't look right? Reach out and our team will review it.