Our award-winning projects are produced through innovation, creativity, and technical expertise. Sustainability is a key element in everything we do: in our project designs, in our staff training, and in our professional activities. It’s so ingrained in the Psomas culture that our motto is “balancing the natural and built environment.” Founded in 1946, we are a full-service consulting firm with offices in California, Washington, Arizona, and Utah. We serve clients in the Transportation, Water, Facilities, Land Development, Energy, and Federal markets.