Applied Research Associates, Albuquerque, New Mexico (N66001-21-D-0132); Gryphon Technologies LLC, Washington, D.C. (N66001-21-D-0133); HII Mission Driven Innovative Solutions Inc., Huntsville, Alabama (N66001-21-D-0134); ISPA Technology LLC, Lithia, Florida (N66001-21-D-0135); Leidos Inc., Reston, Virginia (N66001-21-D-0136; Oasis Systems LLC, Burlington, Massachussetts (N66001-21-D-0137); Peraton Inc., Herndon, Virginia (N66001-21-D-0138); Science Applications International Corp., Reston, Virginia (N66001-21-D-0139); and Serco, Inc., of San Diego, California (N66001-21-D-0140) are awarded a $118,816,148 indefinite-delivery/indefinite-quantity, multiple-award contract with cost-plus-fixed-fee and cost-with-no-fee pricing for technical support including specification and design, fabrication, installation, test and evaluation, fielding, maintenance, training, and configuration and program management of hardware and software in support of surface and subsurface unmanned maritime systems engaged in waterborne and underwater mine countermeasures. This four-year contract includes four one-year option periods which, if exercised, would bring the overall potential value of this contract to an estimated $249,741,160. Work will be performed in San Diego, California (75%); and outside the continental U.S. (25%). The period of performance of the base award is from June 15, 2021, through June 14, 2025. If all options are exercised, the period of performance would extend through June 14, 2029. Awardees will have the opportunity to compete for task orders during the ordering period. No funds will be obligated at the time of award. Fiscal 2021 funds will be obligated as task orders are issued using operation and maintenance (Navy); other procurement (Navy); working capital (DOD); and research, development, test and evaluation (Navy) funds. This contract was competitively procured via a request for proposal (N66001-21-R-0014) published on the web site and Naval Information Warfare Systems Command e-Commerce Central website. Thirteen offers were received and nine were selected for award. Naval Information Warfare Center Pacific, San Diego, California, is the contracting activity.