Sentry Security Agency has been providing various types of on-site security guards for commercial and residential customers for more than 35 years. It provides total security package that includes security guards, residential and commercial alarm systems, building access control, closed circuit televisions and various other applications in the security field. The company offers extensive experience in various phases of security. Its personnel are required to sign an agreement that covers conduct, uniform requirements, attendance, training, and performance of duties. The personnel are also required to apply for and obtain a security license with the police department prior to being hired. Sentry Security Agency is located in St. Louis.