(212) 509 - 5570 About   | Clients   | Press   | Team   CITADEL SECURITY AGENCY has been one of the leading private security companies in New York City since 1981. Founded by a retired NYPD Detective and a retired Sergeant to provide Special Event Security, Trade Show Security, and Security Guards, Citadel has built a reputation as the go-to provider for security guard services in New York City. From private functions to fashion shows, escorts to doormen, Citadel Security provides its clients with professionalism, reliability, and peace of mind. No matter what your need, we provide security with discretion, professionalism, and a proven track record. We have over a 97% client retention rate. Services    | Blog   | Employment   | Terms of Use   | Security Services New York   | New York Security Guards   | New York Event Security NYC Trade Show Security   | Executive Personal Protection   | New York Corporate Security   | Security Consultants   | New York Security Companies