ERProsource360 LLC, Washington, D.C., was awarded a modification estimated at $10,667,342 to exercise Option Period 4 on a time-and-materials, firm-fixed-price General Services Administration contract (47QRAA19D00AK) with an estimated overall value of $43,266,617 inclusive of all options. This task order (W81XWH20F0072) is for materiel fielding and medical liaison support services in support of U.S. Army Medical Materiel Development Agency and the U.S. Army Medical Materiel Activity. Specifically, these services provide materiel fielding and medical liaison support services across the Force Integration Division, USAMMDA, and the Force Projection Directorate, USAMMA at Fort Detrick, Maryland. The overall period of performance is Feb. 3, 2020, to Feb. 2, 2025. The Option Period 4 period of performance is Feb. 3, 2024, to Feb. 2, 2025. The type of solicitation was a competitive set-aside (total small business set-aside). Fiscal 2023, 3-year, Army other procurement funds; and fiscal 2024, 1-year, Army operations and maintenance funds, will be used for the modification. The U.S. Army Medical Research Acquisition Activity, Fort Detrick, Maryland, is the contracting activity.