Mark Anthony Welsh III is Dean of the Bush School of Government and Public Service, a graduate college of Texas A&M University, and a retired United States Air Force officer.

His last military assignment before retiring from the Air Force was as the 20th Chief of Staff of the United States Air Force. He was born in San Antonio, Texas, and entered the United States Air Force in June 1976 as a graduate of the US Air Force Academy. He retired after over 40 years of service on July 1, 2016, when he was relieved by General David L. Goldfein.