This MSSP case study details a 24/7 Managed Detection and Response (MDR) service for a heavy industry manufacturing client. The service addresses the critical intersection of IT and Operational Technology (OT) security by managing a high-risk fleet of endpoints, including legacy systems. Key challenges included a 35-40% "ghost fleet" of offline devices and high-volume alert fatigue. The SOC successfully quarantined targeted Trojans and backdoors, providing business intelligence on the IT/OT risk profile.