Greg McMahon (born January 2, 1960) is an American football coach who is the special teams coordinator for the Tulane Green Wave.

McMahon began his coaching career at his alma mater, Eastern Illinois, in 1982.

From 1990–1991, McMahon was the tight end, offensive tackle and special teams coach for the University of Nevada at Las Vegas.

[6] On March 17, 2022, it was announced that McMahon was hired as the Special teams coordinator/Tight ends coach of the Houston Gamblers of the United States Football League.

[7] On September 13, 2022, McMahon was announced as Special teams coordinator of the Houston Roughnecks of the XFL[8] Following the Roughnecks season, McMahon returned to college football, joining Willie Fritz's Tulane Green Wave football staff as the special teams coordinator in May of 2023.