Operational Technology (OT) cybersecurity has become one of the most critical challenges facing modern infrastructure. As industrial control systems that manage power, water, manufacturing, and transportation become increasingly connected to corporate networks and the internet, they are exposed to cyber threats they were never designed to withstand. Unlike traditional IT breaches that primarily affect data, successful attacks on OT environments can disrupt essential services, damage equipment, and even endanger human lives. Protecting these systems requires a specialized defense-in-depth strategy that combines asset visibility, network segmentation, secure remote access, continuous monitoring, and OT-specific incident response planning. As cyber threats continue to evolve, securing operational technology is no longer just a technical necessity—it is fundamental to economic stability, public safety, and national resilience.