Mack began his coaching career as an offensive graduate assistant for Delta State between 2004 until 2005. During that period, he worked with the running backs, as an assistant special teams coordinator, and video coordinator.
Jackson State
In 2006 and 2007, Mack served as the wide receivers coach and tight ends coach for Jackson State.
Central Arkansas
In 2008 and 2009, Mack worked at Central Arkansas as the team's passing game coordinator and wide receivers coach.
Arkansas–Pine Bluff
For the 2010 season, he worked for Arkansas–Pine Bluff as the team's offensive coordinator and quarterbacks coach. He helped change an offense that was ranked 101st in the nation in total offense to 30th nationally.
Memphis
For the 2011 he went to work in his hometown of Memphis[1] for the Tigers as the team’s wide receivers coach.
South Alabama
In 2012 and 2013 he served as the wide receivers coach[2] for South Alabama Jaguars.[3]
North Carolina Central
From 2014[3] to 2017 Mack served as the head coach for the North Carolina Central Eagles.[4][5] Within his four seasons at North Carolina Central University as the team’s head coach, he led the Eagles to a berth in the 2016 Celebration Bowl. He compiled 31-15 record in four seasons as one of the youngest head coaches at the FBS/FCS level at the time. He was named the 2016 HBCU Football Coach of the Year by Black College Sports Page[6] and The Pigskin Club in Washington, D.C., following NCCU breaking its school record for offense on its way to the Celebration Bowl.
Rice
Mack was named Rice's offensive coordinator and quarterbacks coach on December 12, 2017.[7][8] On February 13, 2019, he was given the added title as associate head coach.[9] He stayed there until the end of the 2020 season.[10]