Post 200 The guide to the region's top businesses

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Private companies

Allegis Group

The staffing firm, founded by James C. Davis and Stephen J. Bisciotti, the owner of the Baltimore Ravens football franchise, is the largest privately held company of its kind in the United States and the fourth-largest globally, with more than 132,000 contract professionals and more than 300 offices worldwide. Allegis Group conducts business through its various operating companies, including Aerotek, Allegis Group Services, Major, Lindsey & Africa, MarketSource, Stephen James Associates, and TEKsystems. It bought Britain’s Aston Carter in February.

7301 Parkway Dr.

Hanover Md., 21076

800-927-8090

http://www.allegisgroup.com/

Founded: 1983

CEO: Michael W. Salandra

Revenue: $6,400,000

Employees (local): 11,345 (90)

NOTE: Our methodology for the rankings.