Physical Security Infrastructure Engineers develop and manage large-scale security architectures across facilities, campuses, and critical infrastructure. They integrate multiple systems such as surveillance, access control, barriers, and communication networks into unified frameworks. Their role focuses on scalability, resilience, and long-term security planning. With the rise of smart cities, digital-physical convergence, and infrastructure modernization, this role is increasingly important. Engineers collaborate with IT, construction, and operations teams to ensure security is embedded into infrastructure design. Global demand is strong due to growing investments in infrastructure protection and risk mitigation strategies.