Sentry Security is a family business with great values and a rich military foundation that has served the St Louis Metropolitan area for over 45 years. With three generations of Marines and three generations of police officers, our background has really given us an advantage in this industry.

Sentry Security Agency employs qualified and insured private security officers, both armed and unarmed, with a considerable number of military veterans. Our dedication to comprehensive training, a clear chain of command, and strong core principles provides a professional and dependable security presence. Our officers prioritize every customer, completing site inspections prior to new service agreements for familiarity with facility layouts, and are easily identified by their necessary uniform and neat appearance. We offer tailored security assessments and create custom post orders for your specific area. Sentry Security will go above and beyond to meet your expectations.

Our Electronic Guard Supervision (EGS) System provides real-time security monitoring. If an on-duty officer misses a predetermined interval, our cutting-edge technology alerts our home office, prompting our 24-hour dispatcher and mobile patrol supervisor to respond quickly. EGS assures total security and provides thorough updates on scheduled security officer patrols upon request. We also respond to business and residential burglar alarms, authenticating alarm provider notifications and addressing concerns such as police non-response due to false alarms.

Our 24/7 mobile patrol service offers round-the-clock protection on construction and industrial sites. Our marked patrol vehicle, manned by qualified and uniformed officers, conducts extensive visual inspections, spotting any breaches or vandalism. In the event of an incident, our officers are trained to remain guard until emergency contacts are alerted and the property is secured, with all events documented in detailed written reports. Sentry Security Agency offers proactive and dependable security solutions.