Engineering and architecture firm Salas O’Brien of San Jose has acquired KDW, PS, headquartered in Seattle.

As part of the Salas O’Brien, LLC family of companies, KDW, PS will be known as KDW Salas O’Brien.

The new business combination will have 125 professionals, more than 30 of whom are registered engineers, architects and communications distribution designers. Salas O’Brien now has nine offices in Burbank, Monterey, Oakland, Orange County, Sacramento, San Jose, San Luis Obispo, Seattle and Bozeman, Mont.