The 2019-20 season will be Mills' first season as a graduate assistant on coach Johnny Estelle's staff.
Mills finished his college basketball career with the Javelinas, playing in every game of the 2018-19 season, averaging 6.3 points per game and hitting 44 three-pointers, second-most on the team.
Mills' basketball career also included stops at N.C. Central University and McLennan College before he arrived at TAMUK.