Psomas Email Format
Civil EngineeringCalifornia, United States501-1000 Employees
Psomas is a civil engineering and consulting firm based in Los Angeles, California, founded in 1946. It operates as a full‑service firm serving clients in transportation, water, facilities, land development, energy, and federal markets. The company maintains offices across California, Washington, Arizona, and Utah, and has expanded into Illinois with a Midwest office in Glen Ellyn. Sustainability is a core element of its work and culture, guiding project design, staff training, and professional activities, with a focus on balancing the natural and built environment. The firm employs between 501 and 1,000 people and maintains information about its offerings on its website at psomas.com.