Sullivan retired from playing basketball and joined his alma mater Portland as their director of basketball technology before becoming an assistant coach at Lewis & Clark College, during which he was also an office manager at a construction firm in Vancouver, Washington.[2]
San Antonio Spurs
Sullivan joined the San Antonio Spurs front office in 2012 as a video intern on the recommendation of then-Spurs assistant Ime Udoka. With the Spurs, he worked his way to a position in player development, where he was tasked with everything from scouting reports to analytics, as well as one-on-one workouts with players. He also worked under Spurs assistant Chip Engelland, considered to be one of the top shooting coaches in the NBA.[1]
Atlanta Hawks
Sullivan was named an assistant coach on former Spurs assistant Mike Budenholzer's coaching staff for the Atlanta Hawks on August 20, 2014.[3]