Immediately after ending his playing career, he served as manager of the Twins' class-A affiliate
Visalia Oaks. He served in that position for three years before returning to Eastern Michigan as an assistant coach. While back with the Hurons, he helped lead EMU to a pair of second-place finishes in 1988 and 1990. He was hired at Bowling Green for his first head coaching job at the collegiate level, just the Falcons ninth coach and fifth since 1928. just weeks later, the school announced that it had fund-raised enough money to revive the program effective immediately. On June 3, 2020, it was announced that Schmitz would step down from head coach and step into an advisory role with the program. ==Head coaching record==