University of Tulsa defensive coordinator Joseph Gillespie is returning to Texas.

Gillespie, TU’s defensive coordinator the past three seasons, agreed to be the defensive coordinator and linebackers coach at TCU, joining Sonny Dykes’ staff. Dykes recently left SMU to become head coach of TCU after Gary Patterson was fired.

Gillespie is expected to bring Tulsa defensive passing game coordinator and cornerbacks coach Carlton Buckels with him to TCU.

Buckels has experience coaching in the Big 12, working at Baylor from 2011-16. Gillespie joined Tulsa as its linebackers coach in 2015. Before coaching in college, Gillespie served as Stephenville High School’s head coach from 2008-14, winning the Class 3A state championship in 2012.