Maddox is the 13th commander of JMC and previously served as the commanding general’s executive officer at AMC, at the Redstone Arsenal in Alabama.
Gardner's next assignment will be at Camp Smith, in Hawaii, where he will be the director for logistics, engineering, and security cooperation at U.S. Indo-Pacific Command.
Officiating at Monday's ceremony was the Commanding General of the Army Materiel Command, General Edward Daly.