The seamless operation of a critical infrastructure is achieved through a set of standard operational procedures. Leveraging new technologies to support threat management processes dramatically reduces the risk of an infrastructure outage. Moreover, private security services assess all risks to which guards are exposed and take measures to prevent dangerous situations to protect them. To handle such a problem, we present an integrated incident management system consisting of several container modules. Our loosely coupled architecture is supported by a message management framework, the main goal of which is to support the operational procedures. The proposed system, based on augmented reality and artificial intelligence, can process multiple video streams provided by closed-circuit televisions to detect possible threats related to the infrastructure. Next, it delivers the necessary information for managing an incident directly to the field and control center. The whole pipeline was employed in Preveza Marina, Greece, while tested and evaluated in real-case scenarios. Integrating such a system resulted in restructuring the standard operational procedures, permitting new security personnel management processes to safeguard health and safety during their work.