Lieutenant General Mason’s last tour on active duty was as the Deputy Chief of Staff, Logistics on the Army Staff, responsible for the worldwide sustainment of Total Army forces across the full range of supply chain management, maintenance, transportation, operational contracting, contingency    basing, operational energy and information technology systems. In this position, General Mason served as the Chairman of three boards: Army Depot Maintenance; Army Uniform; Army & Air Force Exchange Service, and as a member of the Defense Commissary Agency Board. Prior to his duties at the Pentagon, General Mason served as the Deputy Chief of Staff, Logistics, Forces Command, Fort McPherson, Georgia. Forces Command is the Army’s largest and most diverse field command, comprising over 800 thousand Soldiers, providing trained and ready forces to Combatant Commanders. 

During his military career, General Mason commanded and led logistics and multifunctional units from the platoon to national level, across the full range of Army combat and joint operational capabilities. He also had extensive experience in strategic level logistics, to include a tour as the Deputy Director for Logistics, Joint Chiefs of Staff and as the Commander, Troop Support, and Defense Logistics Agency. He served multiple overseas tours in Germany, Australia, Korea and Hawaii. Combat tours included serving as the 82d Airborne Support Command Operations Officer in Grenada, and as the Senior Logistics Officer in 3d Army, with responsibility for providing sustainment to combat forces in Kuwait, Iraq, Afghanistan and Horn of Africa. His command billets include: Services Company, 21 Supply Battalion, Sydney Australia; 407th Forward Support Battalion, 82d Airborne Division; Support Command, 25th Infantry Division; 19th Expeditionary Support Command, Korea; and 8th Theater Support Command, Hawaii, where he was also the Senior Mission Commander overseeing all Army Hawaii missions.