A native of Belton, South Carolina, McCombs is a 1967 graduate of The Citadel, where he earned five varsity letters in football and track. As a defensive back in football, he was an All-Southern Conference and All-State selection. McCombs was inducted into The Citadel Athletic Hall of Fame in 1988.[3]
McCombs was the secondary coach at The Citadel from 1971 to 1983 under head coaches Red Parker, Bobby Ross, and Art Baker and also coached track for two years. He next served as secondary coach and defensive coordinator at the United States Air Force Academy before being named head football coach at VMI in 1998. He was a scout with the Denver Broncos for five years after leaving college coaching. In 2015, he served as a coach in the Medal of Honor Bowl played at The Citadels Johnson Hagood Stadium[4]