Salas O'Brien

Salas O'Brien is an employee-owned engineering and technical services firm founded in 1975. It provides engineering and consulting services for government and private sector clients, working across the built environment on projects ranging from quick-turn assignments to complex systems. The firm employs more than 5,000 people across over 120 offices in North America.

Its technical work spans MEP/FP engineering, structural design, civil engineering, sustainability consulting, digital automation, robotics and forensic consulting. Salas O'Brien ranks #5 among the top 100 MEP firms in North America and #31 in the Engineering News-Record Top 500 Design Firms. Industry verticals served include healthcare, data centers, aerospace, education, process manufacturing and government.

Ninety per cent of team members are employee-owners, and the firm reports a 92% team member retention rate. Revenue has grown 900% since 2015.