HDR, Inc. is an employee-owned design firm, specializing in engineering, architecture, environmental, and construction services. HDR has worked on projects in all 50 U.S. states and in 60 countries, including notable projects such as the Hoover Dam Bypass, Fort Belvoir Community Hospital, and Roslin Institute building. The firm employs over 11,000 professionals and represents hundreds of disciplines in various markets. HDR is the 10th largest employee-owned company in the United States with revenues of $2.5 billion in 2021.Engineering News-Record ranked HDR as the 5th largest design firm in the United States in 2022.