Photos

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SILVER SPRING, Md. (Sept. 3, 2025) Master Chief Hospital Corpsman Phillip Jean-Gilles, command master chief (CMC) of Naval Medical Research Command (NMRC), presents a gift to Lt. Sara Tuck following a reenlistment ceremony in which Tuck administered the oath of enlistment, a career first, to Jean-Gilles. Immediately following his reenlistment, Jean-Gilles relinquished his position as CMC to Master Chief Hospital Corpsman Christopher Cariss during a change of office ceremony. NMRC, headquarters of Navy Medicine Research & Development, is engaged in a broad spectrum of activity from basic science in the laboratory to field studies in austere and remote areas of the world to investigations in operational environments. In support of Navy, Marine Corps and joint U.S. warfighter health, readiness and lethality, researchers study infectious diseases, biological warfare detection and defense, combat casualty care, environmental health concerns, aerospace and undersea medicine, operational mission support and epidemiology. (U.S. Navy photo by Tommy Lamkin/Released)