AAI Corporation, Hunt Valley, Maryland; CSC, Falls Church, Virginia; and Insitu Incorporated, Bingen, Washington, are each being awarded an indefinite-delivery/indefinite-quantity multiple award contract for unmanned aircraft system (UAS) intelligence, surveillance, and reconnaissance (ISR) services in support of the Department of Defense and other government agencies, as well as potential coalition military Foreign Military Sales customers. There are two separate performance-based work statements; one for sea-based requirements, and one for land-based requirements. The scope includes provision of necessary trained personnel, UAS ISR non-developmental equipment, certifications, installation, operation, maintenance, sustainment, spares/product support, and other related support services necessary to support various worldwide sea- and land-based locations. The aggregate not-to-exceed amount for these multiple award contracts is $874 million. The companies will have the opportunity to compete for associated task orders. AAI and Insitu are eligible to compete for both sea-based and land-based task orders. CSC is only eligible to compete for land-based task orders. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.