Salas O'Brien Email Format
Engineering ServicesCalifornia, United States1001-5000 Employees
Salas O’Brien is an employee-owned engineering and technical services firm headquartered at 8825 Research Drive, Irvine, California 92618, United States. The company focuses on engineering services for the built environment and emphasizes advancing the human experience, with attention to sustainability and decarbonization. It employs between 1,001 and 5,000 people. Industry publications Engineering News-Record and Consulting-Specifying Engineer have recognized Salas O’Brien as a top firm, and the company has appeared on the Inc. 5000 list of North America’s fastest-growing private companies for more than a decade. The firm has pursued growth through acquisitions and partnerships, including the 2026 acquisition of TechSource and a Siemens collaboration, along with 2025 acquisitions of Lighting Design Alliance and BWK Engineering and a merger with M/E Engineering.