ZOLL Medical Corp., Chelmsford, Massachusetts, has been awarded a maximum $611,688,910 modification (P00020) exercising the five-year option period of a five-year base contract (SPE2D1-19-D-0011) with one five-year option period for patient monitoring and capital equipment. This is a firm-fixed-price, indefinite-delivery/indefinite-quantity contract. The ordering period end date is Jan. 13, 2029. Using military services are Army, Navy, Air Force, Marine Corps, and federal civilian agencies. Type of appropriation is fiscal 2024 through 2029 defense working capital funds. The contracting activity is the Defense Logistics Agency Troop Support, Philadelphia, Pennsylvania.