Upon graduating, Blakeney landed his first assistant coaching position under Lefty Driesell at James Madison, where he stayed for one season before another one-year stop at La Salle. Blakeney joined former Duke assistant coach Mike Brey's staff at Delaware, where he stayed from 1997 to 2001. During the 2001–02 season, Blakeney served as an assistant coach at Seton Hall before returning to Delaware for a second assistant coaching stint.[5] In 2006, Blakeney became an assistant coach at Marshall before joining another former assistant coach from his playing days, working with Tommy Amaker at Harvard.[6][7]
In 2011, Blakeney left coaching for the private sector, working at Under Armour in the company's marketing division.[1] He returned to coaching in 2018, joining the staff at Columbia.[8][4] On May 6, 2019, Blakeney was named the 10th head coach in Howard men's basketball history, replacing Kevin Nickelberry.[9] Blakeney signed the top recruit in Howard history, Makur Maker, on July 3, 2020.[10]