Allegis Group , headquartered in Hanover , Maryland , in the United States, is one of the most privately held staffing and recruitment services companies in the world, with $ 11 billion in revenue in 2015.  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 . 
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- Jump up^ “Post 200 – Allegis Group” . Post 200 . Archived from the original on August 31, 2006 . Retrieved 2006-01-01 .