He served as the head football coach at the Angelo State University from 2011 until he was fired during the 2018 season.

Wagner was hired as the seventh head football coach at Angelo State University on December 23, 2010.

He attended Permian High School, where as a defensive back and wide receiver he helped lead his team to win the state championship in 1991, his senior year.

Wagner then transferred to Northwest Missouri State to serve as a graduate assistant for Mel Tjeerdsma.

After the fall 2010 football season, Angelo State University fired previous head coach Dale Carr.