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Name: O'Neill, Mark
Current Position: Former Deputy Commandant
The Deputy Commandant of the Command and General Staff College is Brigadier General Mark E. O’Neill, a native of St. Louis, Missouri. After receiving his Bachelor of Science in 1978 from the United States Military Academy, O’Neill was commissioned as an infantry soldier. He continued in the military, going on to command tactical units at the platoon, company, battalion and brigade levels. O’Neill served as Assistant Army Attaché in the Defense Attaché at the American Embassy in Beijing, China.
Brigadier General O’Neill has attended numerous schools and is a graduate of the US Army Foreign Area Officer’s Course, the Defense Language Institute, and the Naval Post Graduate School in Monterey, California where he received a Master of Arts in National Security Affairs. He went on to study at the Beijing University School of Foreign Languages and the British Ministry of Defense Chinese Language School while assigned to the US Defense Liaison Office in Hong Kong.
O’Neill previously served as the Deputy Director for Strategy, Plans and Policy in the Department of Army, where he led the Army’s analytical assessment of the initial phase of Operation Iraqi Freedom. Prior to being appointed as Deputy Commandment of CGSC, O’Neill served as the Deputy Division Commander for Support for the 3rd Infantry Division located at Fort Benning, Georgia as well as the Deputy Division Commander for Support of the Multinational Division in Baghdad during Operation Iraqi Freedom.