Bechtel Corporation is an American engineering, procurement, construction, and project management company founded in San Francisco, California, and headquartered in Reston, Virginia. It is the largest construction company in the United States and the 11th-largest privately owned American company in 2018. Its headquarters are in the Reston area of unincorporated Fairfax County, Virginia. Bechtel is a global engineering, construction, and project management company, and they are currently working on projects in over 40 countries. The company is organized into five global business units that specialize in civil infrastructure; power generation, communications, and transmission; mining and metals; oil, gas, and chemicals; and government services.