Garrett Mack joined the DU defensive staff for the 2024 season after the closing of Notre Dame College (OH) in Cleveland. Mack was head coach for two seasons at the perennial Division II powerhouse after serving as an assistant for two years prior, holding titles of Run Game Coordinator, Defensive Line Coach and Recruiting Coordinator along the way. In his first season as head coach of the Falcons, they won the Mountain East Conference title and advanced to the NCAA Division II playoffs finishing with a 9-3 (9-1 MEC) record.  

Mack’s 2022 defensive unit at Notre Dame led Division II with six defensive touchdowns and held opponents to an 86.73 passing efficiency. Mack coached 30 Falcons to All-MEC honors in two seasons as head coach, saw six get named all-region and had 10 Academic All-District honorees with one Academic All-American. Prior to NDC, Mack was a linebackers coach at Oberlin College (2017, ‘19) and served as wide receivers/strength and conditioning coach at his alma mater Baldwin Wallace (2018). 

Mack graduated from Baldwin Wallace in 2015, where he worked as a student assistant coach. He holds a Bachelor's Degree in health and physical education.