Companies
Salas O'Brien, Inc.
Employees

How many employees work at Salas O'Brien?

Q: How many employees work at Salas O'Brien?

Salas O'Brien, Inc. has 4,266 employees, according to Revelio Labs workforce intelligence data. The year-over-year growth rate is 5.3%.

Salas O'Brien, Inc. has 4,266 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 5.3%.

Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025

About Salas O'Brien

Salas O’Brien is an employee-owned engineering and technical services firm focused on advancing the human experience through the built environment. Our team is engineered for impact™, helping clients achieve critical goals, advancing our team members through growth and opportunity, and operating at the center of important global issues, including sustainability and decarbonization. We are a top firm as ranked by Engineering News-Record and Consulting-Specifying Engineer, and we have appeared for the past eleven years on the Inc. 5000 list of North America’s fastest-growing private companies.

As of December 2025

Salas O'Brien
workforce metrics

Headcount

4.3k

Avg. Salary

$104.2k

Tenure

5.1yr

Growth Rate

5.3%

Hiring Rate

Attrition Rate

For even more metrics data,
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Employee Headcount

Interactive chart of Salas O'Brien annual worldwide employee count from 2023 to 2025.

Salas O'Brien total number of employees in 2025 was 4,268, a 5.3% increase from 2024.
Salas O'Brien total number of employees in 2024 was 4,049, a 5.8% increase from 2023.
Salas O'Brien total number of employees in 2023 was 3,821, a 8.0% increase from 2022.