Johns Hopkins Applied Physics Laboratory, Laurel, Maryland (HT001121D0002), was awarded an indefinite-delivery/indefinite-quantity, single award contract with a maximum of $100,000,000 to maintain an essential research and engineering capability supporting long-term organizational performance improvement within the Military Health System (MHS); engagement with external stakeholders and supported military commands; advisory and assistance support on complex issues affecting strategic planning, resource allocation, and operational oversight of the MHS; and exploratory research and investigations in topics of interest to the MHS. This effort has an ordering period beginning June 1, 2021, and ending May 31, 2026. Work location is task order dependent but primarily will occur at Laurel, Maryland. Task orders will be funded by research, development, test and engineering; or operation and maintenance appropriations available for obligation at the time of ordering. This contract was awarded under other than full and open competition with no other sources solicited. The Defense Health Agency Professional Services Contracting Division, Falls Church, Virginia, is the contracting activity. (Awarded June 1, 2021)