Marine Corps Gen. Joseph F. Dunford Jr. - 19th Chairman of the Joint Chiefs of Staff Marine Corps Gen. Joseph F. Dunford Jr. served as the 19th chairman of the Joint Chiefs of Staff from Oct. 1, 2015, to Sept. 30, 2019. Prior to assuming the role of principal military advisor to the president, defense secretary and National Security Council, Dunford was the 36th commandant of the Marine Corps. SHARE: Download: Full Size (0.77 MB) Tags: Chairman, Biographical Portrait, Joint Chiefs, Joseph F. Dunford Jr., leaders Credit: Chris Marquardt VIRIN: 150101-Z-ZZ999-001.JPG Photo Gallery