Leidos Inc., Reston, Virginia (HC104722D0002), was awarded a competitive, single-award, indefinite-delivery/indefinite-quantity contract with a ceiling value of $11,504,145,491, with firm-fixed-price, labor hour, and cost reimbursable line items for the Defense Enclave Services (DES). The DES contract will unify the Department of Defense’s (DOD) Fourth Estate common use information technology (IT) systems, personnel, functions and program elements under the Defense Information Systems Agency. The DES contractor will manage, operate and support the network architecture. The objective of the DES contract is to provide integrated, standardized, and cost-effective IT services; while improving security, network availability, and reliability for the 22 defense agencies and field activities within DOD’s Fourth Estate. DES will establish the modern infrastructure foundation and united frame of thought needed to deliver cohesive combat support capabilities to the warfighter. The contract’s minimum guarantee of $500 will funded by the Defense Working Capital Fund. Performance will be at DOD Fourth Estate locations world-wide. Proposals were solicited via the Contract Opportunities website on SAM.gov, and seven proposals were received. The ordering period is Feb. 28, 2022, through Feb. 27, 2026, with three two-year option periods, which, if exercised, would extend the ordering period through Feb. 27, 2032. The Defense Information Technology Contracting Organization – National Capital Region, Fort Meade, Maryland, is the contracting activity.