Our History...

Glenbrook Security Services, Inc.
Although the scope of services and the size of our company has grown considerably throughout the years, our commitment to excellence in the security industry has remained constant. Our company, originally known as Glenbrook Patrol Service, Inc., was founded in Glenview, Illinois, in 1959. At that time, the company focused on providing quality patrol services to local residences and businesses. Glenbrook experienced continued growth, and in 1964 expanded its scope of services to include security guard services. In 1991, our company name was changed to Glenbrook Security Services, Inc. to better reflect our ongoing commitment to serving as a premier full-service security company. Today, Glenbrook Security Services, Inc. is one of the largest and most comprehensive providers of security and protection services in the State of Illinois.

The growth of our company is due in large part to our strive for excellence, our commitment to professionalism and our dedication to the security industry and our community. Much of our current success is attributed to the good recommendations of current clients and of industry and community leaders. Glenbrook Security Services, Inc. will continue to focus on providing quality security services throughout Chicago and its suburbs.

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