He has previously been an assistant coach at Fort Wayne, Indiana Tech, Lincoln Trail College, Butler, and Ohio State.
In 1997, playing baseball, he was named All-Conference, team MVP, and co-Male Athlete of the year.
He finally got his big break in 2007 when he was brought back to Butler under current Boston Celtics head coach Brad Stevens.
He got his first coaching job in the Big Ten in 2017, when he left Butler with Holtmann to join the Ohio State.
Ohio State has made two NCAA men's basketball tournaments with Johnson as an assistant coach.