General Mark Milley is a senior military officer in the United States Army, serving as the 20th Chairman of the Joint Chiefs of Staff since September 2019. He has held various leadership positions throughout his career, including serving as the Chief of Staff of the Army. Milley is known for his extensive experience in military operations and strategy. Born on June 18, 1958, in Winchester, Massachusetts, Milley graduated from Princeton University and was commissioned as an officer in 1980. He has served in multiple conflicts, including Iraq and Afghanistan, and has been involved in key military decisions during his tenure.