Immediately after graduation, Alexander joined the Belmont coaching staff under Rick Byrd, where he stayed for 16 seasons. He was a part of a coaching staff that reached four NCAA Tournaments. In 2011, Alexander got his first head coaching job at ASUN Conference rival Stetson, where he guided the Hatters to a 24–36 record in two seasons. On May 18, 2013, Alexander was named the head coach of Lipscomb, remaining in the A-Sun, and returning to his native Tennessee. In 2018, Alexander coached Lipscomb to its first Atlantic Sun title and first NCAA Division I Tournament appearance, and coached Lipscomb to its 1st regular season championship in 9 years in 2019. He was the 2018 recipient of the Skip Prosser Man of the Year Award.[2] On April 10, 2019 he was named head coach for Belmont University, following former head coach Rick Byrd's decision to retire after 33 seasons.