In six seasons as an assistant coach under Michigan head coach John Beilein, Michigan advanced to the NCAA tournament each year, won Big Ten Conference regular season championships in 2012 and 2014 and appeared in the Elite 8 in 2014 and the National Championship in 2013.

[1][2] In two seasons with the Detroit, Alexander appeared in 62 games and, along with teammate and fellow co-captain Jermaine Jackson, helped lead the Titans to back-to-back NCAA tournament berths in 1998 and 1999.

He has held assistant coaching positions at Detroit (2001–2007), Ohio with Tim Oshea (2007–08), and Steve Hawkins at Western Michigan(2008–2010).

Alexander's creative and inspiring pregame speeches, often involving props, were credited with keeping the team loose and ready to compete.

Before a game against Michigan State, Alexander wore a construction hat and safety goggles while urging the group to "go to work".

[13][14][8] On April 6, 2013, Alexander was profiled in The New York Times as "a showman often ranked among college basketball's most fashionable assistants" and "a recruiter who can regale elite young players with tales from his two seasons with the Globetrotters.

"[8] On April 21, 2016 Detroit Mercy announced Alexander as the new head coach of the men's basketball team, replacing Ray McCallum.