Guardian Security Services, Inc., established in 1975, has nearly 50 years of successful security business experience. We are a family owned, second generation full service security firm locally managed with our Corporate Headquarters located in the Chicagoland area. Our proven contract, military and law enforcement experience has provided the U.S. Government, private industry and foreign clients with a broad range of security services and investigative capabilities. Guardian and its principals provide expert security consulting, planning, implementation and evaluation to safeguard lives and property.