Since the employee buyout in 1996 from the French conglomerate Bouygues, HDR has acquired over 60 firms around the world. In February 2011, HDR acquired Cooper Medical, an Oklahoma City, Oklahoma, based firm providing integrated design and construction services for healthcare facilities throughout the U.S. The new alliance, HDR Cooper Medical, will provide a service design and construction delivery model to healthcare clients. In February 2011, HDR acquired Schiff Associates, a recognized leader in corrosion engineering headquartered in Claremont, California, with offices in Houston, Las Vegas, and San Diego. Schiff is now conducting business as HDR|Schiff.