Allegis Group, heaquartered in Hanover, Maryland, United States, is one of the world’s largest privately held staffing companies with $4.4 billion in revenues in 2005. Founded in 1983 by Steve Bisciotti and Jim Davis, the company, then known as Aerotek, originally focused on providing technically skilled people to the expanding engineering and aerospace industry. Jim Davis still has majority control of Allegis Group. Bisciotti has turned his attention to his ownership of the National Football League's Baltimore Ravens.