KBR, formerly known as Kellogg Brown & Root, is one of the leading engineering, general contracting and construction companies in Alabama. The company serves clients in the energy and petrochemical industries, as well as public sector. It specializes in structural and civil engineering services. Headquartered in Houston, the company employs a staff of more than 50,000 engineers and other support personnel. KBR also maintains locations throughout the world that includes Australia, Africa, Asia and the United Kingdom. It undertakes projects for the United States Army and the U.S. Department of Defense. In addition, KBR has been serving clients for more than 100 years.