How many employees work at ESR?
Institute of Environmental Science & Research Ltd. has approximately 492 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. ESR’s total headcount has declined 7.6% from 532 employees in 2023 to 492 in 2026.
Is ESR hiring right now?
Yes, ESR is actively hiring. ESR had 1 active job postings in 2026, a 120.0% decline from 2025 — see job openings & hiring trends.
About ESR’s Workforce
Institute of Environmental Science & Research Ltd. is a Public Sector Management company that employs 492 people worldwide as of March 2026. It is the 7th-largest by headcount among its peers. Founded in 1992, the company is headquartered in Porirua, New Zealand.
ESR's workforce has declined 7.6% from 2023 to 2026, down 1.3% year over year in 2026. It fell to a low of 482 in 2025 Q1 before recovering. Its workforce is concentrated most in Pacific Islands (95.7%), followed by Central America and the Caribbean (2.7%) and Sub-Saharan Africa (1.0%).
ESR's functional groups are Finance and Operations (45.6%), Engineering (35.7%), and Sales and Marketing (18.7%), with Sales and Marketing growing fastest (up 4.2%). The average salary is $75,342, ranging from a median of $72,000 in Pacific Islands to $42,000 in Central America and the Caribbean, down 0.9% year over year in 2026.
ESR's active job postings fell 120.0% in 2026 to 1, with new postings per month cooling from 22 in 2023 to 2 in 2026. Overall employee sentiment is neutral and broadly stable.
Sourced from Revelio Labs workforce data.
- Headquarters
- Porirua, New Zealand
- Founded
- 1992
- Industry
- Public Sector Management
- Employees
- 492
- YoY
- -1.3% (+10)
As of March 2026
ESR workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for ESR. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsESR Annual Employee Count (2023-2026)
- ESR had 492 employees in 2026, a 1.3% decline (+10) from 2025.
- ESR had 486 employees in 2025, a 5.1% decline (-24) from 2024.
- ESR had 510 employees in 2024, a 2.5% decline (-14) from 2023.
- ESR had 524 employees in 2023, a 0.5% increase (+2) from 2022.
ESR's total workforce has grown from 482 employees in 2025 to 492 in 2026. ESR's headcount peaked at 544 in 2024 before declining in 2025 and recovering through 2026.
Institute of Environmental Science & Research Ltd. quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 492 | +10 | -1.3% |
| 2025 | Q4 | 486 | -24 | -5.1% |
| 2025 | Q3 | 483 | -42 | -6.8% |
| 2025 | Q2 | 485 | -53 | -7.4% |
| 2025 | Q1 | 482 | -62 | -7.4% |
| 2024 | Q4 | 510 | -14 | -2.5% |
| 2024 | Q3 | 525 | +0 | -0.9% |
| 2024 | Q2 | 538 | +6 | +0.4% |
| 2024 | Q1 | 544 | +21 | +1.8% |
| 2023 | Q4 | 524 | +2 | +0.5% |
| 2023 | Q3 | 525 | +17 | +2.7% |
| 2023 | Q2 | 532 | +39 | +3.7% |
See ESR's complete headcount history, including quarterly breakdowns.
Get the DataESR Employee Count by Region (2026)
Pacific Islands accounts for the largest share of ESR's global workforce with approximately 96% of total employees, followed by Central America and the Caribbean and Sub-Saharan Africa.
ESR employees by region
| Region | Employees | % of Total |
|---|---|---|
| Pacific Islands | 466 | 95.7% |
| Central America and the Caribbean | 13 | 2.7% |
| Sub-Saharan Africa | 5 | 1.0% |
| North America | 3 | 0.7% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataESR Employee Count by Department (2026)
ESR's employee groups are Finance and Operations (45.6%), Engineering (35.7%), and Sales and Marketing (18.7%).
ESR employees by department
| Department | Employees | % of Total |
|---|---|---|
| Finance and Operations | 224 | 45.6% |
| Engineering | 176 | 35.7% |
| Sales and Marketing | 92 | 18.7% |
Compare ESR's department mix to industry peers.
See Full DataESR Employee Salary by Region (2026)
ESR's average employee salary is $75,342 globally. Employees in Pacific Islands receive the highest compensation. Pay is lowest in Central America and the Caribbean, at a median of $42,000.
ESR median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| Pacific Islands | $72,000 |
| North America | $59,000 |
| Central America and the Caribbean | $42,000 |
Unlock salary by role, level, and city — and compare to ESR's industry peers.
Unlock Salary DataESR Job Openings and Hiring Trends (2023-2026)
- ESR had 1 active job postings in 2026, a 120.0% decline (+1) from 2025.
- ESR had 0 active job postings in 2025, a 200.0% decline (-1) from 2024.
- ESR had 1 active job postings in 2024, a 150.0% decline (-6) from 2023.
- ESR had 7 active job postings in 2023, a 200.0% increase from 2022.
- Hiring velocity in 2026: 2 new roles/month, down from 4 in 2025 and 10 in 2024.
ESR's hiring is slowing: active job postings fell 120.0% in 2026 to 1, with new postings per month cooling from 22 in 2023 to 2 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataESR Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across ESR's workforce based on public professional data. Overall sentiment is neutral 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 ESR
- How fast is ESR growing?
- In 2026, ESR's headcount shrank 1.3% to 492 employees, up from 482 in 2025.
- See the full headcount history
- Where are ESR employees located?
- Most ESR employees are based in Pacific Islands (95.7% of headcount), followed by Central America and the Caribbean and Sub-Saharan Africa.
- Explore where the workforce is based
- What is the average salary at ESR?
- The average employee salary at ESR is approximately $75.3k per year.
- Analyze the salary distribution
- How many new job postings does ESR open per year?
- In Q1 2026, ESR opened 5 new job postings. In 2025, ESR opened 48 new job postings — about 4 per month.
- Track hiring trends by role
- When was ESR founded and where is it headquartered?
- ESR was founded in 1992 and is headquartered in Porirua, New Zealand.
- Compare ESR to industry peers
Speak with a workforce expert about ESR.
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