GCI Security, Inc. is a privately owned security services company based in the Greater St. Louis area, Missouri. The firm provides professional guarding services to a range of clients, including private neighborhoods, corporate offices, retail properties, and industrial sites. GCI holds the distinction of being the first company to deliver private security services to local taxing districts in St. Louis.
The company emphasizes a structured career path for its personnel. Its Fast-Track Leadership Program is a 15-month initiative designed to develop officers into team leaders. Additionally, GCI funds its Five-Star Shield Training System, which provides education in first aid/AED, de-escalation, crisis response, customer service, and professional report writing.



