As of 2014, Securitas North America, G4S Secure Solutions USA, Allied Barton Security, US Security Associates and Universal Protection Service are among the top guarding firms or security agencies in United States, according to Security Magazine. The firms are rated based on a survey of officers for security guard revs.
Guardsmark, National Security Alliance, ACSS (Amer. Comml. Security), FJC Security Services and Covenant Services Worldwide are other firms in Security Magazine’s top guarding firms listings of 2014.
Headquartered in Chicago, Illinois, Securitas North America is the top guarding firm in the United States and has offices in 600 locations across the country. It employs over 105,000 people. It was also the most successful security agency in terms of revenue with $36 billion in revenues in 2013.