How many employees work at Quest Diagnostics?
Quest Diagnostics, Inc. (DGX) has approximately 57,109 total employees worldwide as of December 2025, according to Revelio Labs workforce intelligence data. Quest Diagnostics's total headcount has declined 0.4% from 57,338 employees in 2023 to 57,109 in 2025.
Data source: Revelio LabsCoverage: Global workforce, 2023–2026Published June 2026
Is Quest Diagnostics hiring right now?
Yes, Quest Diagnostics is actively hiring. Quest Diagnostics had 3,213 active job postings in 2025, a 2.8% increase from 2024 — see job openings & hiring trends.
About Quest Diagnostics's Workforce
Quest Diagnostics, Inc. (DGX) is a Healthcare and Wellness Services company that employs 57,109 people worldwide as of December 2025. It is the 3rd-largest by headcount among its peers. Founded in 1967, the company is headquartered in Secaucus, New Jersey and trades on the New York Stock Exchange.
Quest Diagnostics's workforce has held roughly steady from 2023 to 2025, though it is up 1.1% year over year in 2025. Its workforce is concentrated most in the United States (73.5%), followed by Canada (15.8%) and India (3.4%), with India, its fastest-growing location, up 7.7%.
Quest Diagnostics's largest functional groups are Engineering (48.6%), Finance and Operations (36.0%), and Sales and Marketing (15.5%), with Engineering growing fastest (up 1.2%). Median employee tenure is 5.9 years. The average salary is $63,429, ranging from a median of $57,000 in Northern Europe to $6,000 in Southern Asia.
Quest Diagnostics's active job postings rose 2.8% in 2025 to 3,213, with new postings per month cooling from 3,713 in 2023 to 2,126 in 2025. Overall employee sentiment is negative but improving.
Sourced from Revelio Labs workforce data.
As of December 2025
Quest Diagnostics
workforce metrics
Headcount
57.1k
1.1% YoY
Avg. Salary
$63.4k
0.4% YoY
Tenure
5.9yr
0.2yr YoY
Growth Rate
1.1%
1.0pts YoY
Hiring Rate
Attrition Rate
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Quest Diagnostics. Compare to peers, export the dataset, and access the full quarterly history.
- Quest Diagnostics had 57,109 employees in 2025, a 1.1% increase (+615) from 2024.
- Quest Diagnostics had 56,494 employees in 2024, a 0% no change (+23) from 2023.
- Quest Diagnostics had 56,471 employees in 2023, a 2.1% decline (-1,179) from 2022.
Quest Diagnostics's total workforce has grown from 56,294 employees in 2024 to 57,109 in 2025. Quest Diagnostics's headcount peaked at 57,338 in 2023 before declining in 2024 and recovering through 2025.
Quest Diagnostics, Inc. — quarterly employee count (2023–2025)
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2025 | Q4 | 57,109 | +615 | +1.1% |
| 2025 | Q3 | 56,846 | +271 | +0.5% |
| 2025 | Q2 | 56,602 | +62 | +0.1% |
| 2025 | Q1 | 56,426 | +132 | +0.2% |
| 2024 | Q4 | 56,494 | +23 | +0.0% |
| 2024 | Q3 | 56,575 | -212 | -0.4% |
| 2024 | Q2 | 56,540 | -422 | -0.7% |
| 2024 | Q1 | 56,294 | -1,044 | -1.8% |
| 2023 | Q4 | 56,471 | -1,179 | -2.1% |
| 2023 | Q3 | 56,787 | -1,622 | -2.8% |
| 2023 | Q2 | 56,962 | -1,899 | -3.3% |
| 2023 | Q1 | 57,338 | -1,484 | -2.6% |
Want to see Quest Diagnostics's complete headcount history back to 2017, including quarterly breakdowns?
The United States accounts for the largest share of Quest Diagnostics's global workforce with approximately 74% of total employees, followed by Canada and India. Quest Diagnostics's headcount in India is growing fastest among its major locations, up 7.7% year over year in 2025.
Quest Diagnostics employees by country — 2025
| Country | Employees | % of Total | YoY % |
|---|---|---|---|
| United States | 41,820 | 73.5% | +0.5% |
| Canada | 8,970 | 15.8% | +1.2% |
| India | 1,920 | 3.4% | +7.7% |
| Colombia | 1,041 | 1.8% | -2.9% |
| Mexico | 390 | 0.7% | -3.3% |
| Finland | 259 | 0.5% | +0.3% |
| Puerto Rico | 175 | 0.3% | +0.0% |
| France | 166 | 0.3% | +0.0% |
| United Kingdom | 153 | 0.3% | -0.5% |
| Pakistan | 131 | 0.2% | +1.1% |
Drill into city-level data, hiring trends by region and historic geographic shifts
Quest Diagnostics's largest employee groups are Engineering (48.6%), Finance and Operations (36.0%), and Sales and Marketing (15.5%).
Quest Diagnostics employees by department — 2025
| Department | Employees | % of Total | YoY % |
|---|---|---|---|
| Engineering | 27,440 | 48.6% | +1.2% |
| Finance and Operations | 20,313 | 36.0% | +0.4% |
| Sales and Marketing | 8,728 | 15.5% | +0.2% |
Compare Quest Diagnostics's department mix to industry peers.
Quest Diagnostics's average employee salary is $63,429 globally. Employees in Northern Europe receive the highest compensation. Pay is lowest in Southern Asia, at a median of $6,000.
Quest Diagnostics median employee salary by region — 2025 (USD)
| Region | Median Salary |
|---|---|
| Northern Europe | $57,000 |
| Pacific Islands | $55,000 |
| Western Europe | $55,000 |
| Northern America | $51,000 |
| Eastern Europe | $34,000 |
| Southern Europe | $26,000 |
| Eastern Asia | $24,000 |
| Central and Western Asia | $23,000 |
| Arab States | $23,000 |
| Central America and the Caribbean | $20,000 |
| Southern America | $12,000 |
| Sub-Saharan Africa | $9,000 |
| South-Eastern Asia | $9,000 |
| Northern Africa | $9,000 |
| Southern Asia | $6,000 |
Unlock salary by role, level, and city — and compare to Quest Diagnostics's industry peers.
- Quest Diagnostics had 3,213 active job postings in 2025, a 2.8% increase (+88) from 2024.
- Quest Diagnostics had 3,125 active job postings in 2024, a 34.4% decline (-1,300) from 2023.
- Quest Diagnostics had 4,425 active job postings in 2023, a 72.7% decline from 2022.
- Hiring velocity in 2025: 2,126 new roles/month, down from 2,491 in 2024 and 3,713 in 2023. New metric
Quest Diagnostics's active job postings rose 2.8% in 2025 to 3,213, with new postings per month cooling from 3,713 in 2023 to 2,126 in 2025.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Revelio Labs tracks employee sentiment across Quest Diagnostics's workforce based on public professional data. Overall sentiment is negative and has improved year over year in 2025.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
Similar Healthcare and Wellness Services Companies by Employee Count
- How fast is Quest Diagnostics growing?
- In 2025, Quest Diagnostics's headcount grew 1.1% to 57,109 employees, up from 56,494 in 2024.
- Where are Quest Diagnostics employees located?
- Most Quest Diagnostics employees are based in the United States (73.5% of headcount), followed by Canada and India.
- What is the average salary at Quest Diagnostics?
- The average employee salary at Quest Diagnostics is approximately $63.4k per year.
- How many people does Quest Diagnostics hire per year?
- In 2025, Quest Diagnostics opened roughly 25,512 new roles — about 2,126 per month.
- When was Quest Diagnostics founded and where is it headquartered?
- Quest Diagnostics was founded in 1967 and is headquartered in Secaucus, New Jersey.
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