Chris Roan, left, shakes hands with Col. Timothy Walsh, deputy commander of U.S. Army Medical Logistics Command, during Roan’s retirement ceremony Sept. 17 at Fort Detrick, Maryland. Roan retires with nearly 40 years of federal service.

Col. John “Ryan” Bailey, right, commander of the U.S. Army Medical Materiel Agency, presents Chris Roan with the Civilian Service Commendation Medal during Roan’s retirement ceremony Sept. 17 at Fort Detrick, Maryland. Roan retires with nearly 40 years of federal service.

Chris Roan, left, speaks during his retirement ceremony Sept. 17 at Fort Detrick, Maryland. Looking on is Maj. Zachary Patterson. Roan retires with nearly 40 years of federal service.

Col. John “Ryan” Bailey, left, commander of the U.S. Army Medical Materiel Agency, presents Chris Roan with a gift during his retirement ceremony Sept. 17 at Fort Detrick, Maryland. Roan retires with nearly 40 years of federal service.