Monahan began attending
Michigan College of Mining and Technology in 1947. When he joined the varsity team in 1948 the team was still trying to make a name for itself and he helped the Huskies post their first winning season in a decade in his second campaign. That year saw Monahan score the first
hat-trick by a defenseman in program history, a feat that has been accomplished only three times since (as of 2020). After sitting out for two seasons, Monahan returned and continued to perform well for the Huskies, being named as an
AHCA First Team All-American in his final season. After graduating Monahan worked as a sales manager for the
Ethyl Corporation and later formed his own consulting company. He was inducted into the Michigan Tech Athletic Hall of Fame in 1993. ==Personal==