Security Guards

Professional armed security guards, unarmed security guards, and police officers.

Mobile Patrols

Dedicated marked or unmarked vehicle patrols for sites of all sizes.

Security Cameras

State-of-the-art security camera system installation and monitoring.

Security Investigations

Thorough security consulting, audits, site planning, and investigations.


Over 30 Years of Proven Results

A long-term record of security expertise and innovative security solutions throughout the Greater St. Louis area.

Accessible & Experienced Management

Family-owned & operated, building dedicated partnerships between our most experienced security experts and our clients.

Dedicated Personnel & Customized Solutions

Reliable security professionals and an adaptive team response to any and all security concerns.

Access To Our 24/7 Dispatch Center

Unmatched responsiveness with answers to all questions and concerns are just a phone call away.



    The GCI Security team is ready to put an end to your security concerns with adaptive and cost-effective solutions. Please fill out the form below and one of our experts will contact you with more information about our guarding, security camera, or investigation services.

    • Board of Commissioners
      GCI Security works with the Cathedral Square Special Business District as a partner rather than a customer. We value our collaborative relationship and GCI’s responsiveness to the needs of our neighborhood.
      Board of Commissioners
      Cathedral Square S.B.D.
    • Mark Branham
      GCI Security has always been willing to go the extra mile to ensure that our store locations are protected. The responsiveness is second to none, and we greatly value the professionalism and reliability of the GCI officers.
      Mark Branham
      Quiktrip Corporation
    • Don Brown
      Gary has always handled himself with the utmost respect and professionalism. He has instilled those qualities into the people that have protected my business. They have been long-term, punctual, and trustworthy. It is a good feeling knowing that I am fully protected every night by the people I have known for a long time and I can trust.
      Don Brown
      Don Brown Chevrolet