[1] He played his college basketball at Maryland under Gary Williams where he was a three-year starter and part of a trio of NCAA tournament appearances with the Terrapins.
[2] Simpkins embarked on a professional career from 1997 to 2003, playing the USBL and ABA, as well as in various teams abroad including Olimpia Milano in Italy during the 2002–2003 season and Shandong in China in 2003.
His first coaching opportunity in the college ranks came with Towson, where he was hired as the coordinator of basketball operations under Pat Skerry in 2011.
[4] After a single season with the Tigers, Simpkins became an assistant coach at UNC Greensboro where he worked under Wes Miller from 2012 to 2015.
[5] He'd return closer to the DMV area and join the staff at George Mason where he'd serve under both Dave Paulsen and Kim English from 2015 until 2023.