The 638 Supply Chain Management Group (SCMG) is a branch within the U.S. Air Force's Air Force Materiel Command (AFMC). Its primary function is to manage and oversee logistics operations and supply chain activities for the AFMC, ensuring the timely delivery of resources required by various Air Force units and missions. The group operates under the AFMC's Ogden Air Logistics Complex in Utah. Key responsibilities include inventory management, transportation coordination, procurement, and distribution of goods and services. The 638 SCMG works closely with other supply chain organizations within the U.S. Department of Defense to maintain readiness, support contingency operations, and uphold strategic partnerships.