He is currently the head coach at Midway High School in Waco, Texas.
In 2008, he became the head coach of Stephenville where he led the team to a state championship in 2012.
[1][2] In 2016 he was hired as the linebackers coach at Tulsa, and was promoted to defensive coordinator in 2019.
[2][3] In 2022, he was hired by first year head coach Sonny Dykes to be the defensive coordinator of TCU.
[6] However, the TCU defense struggled in 2023, missing a bowl, leading to Gillespie's dismissal on December 10, 2023.