Kaimon Rucker reveals the biggest differences between new DC Geoff Collins, Gene Chizik Posted Jul 28, 2024 Former Georgia Tech head coach Geoff Collins became the third new defensive coordinator at North Carolina this offseason since Mack Brown‘s return to the program in 2019. The Tar Heels continue to strive towards improving on the defensive side of the ball. Apparently Collins has been doing just that during his short time in Chapel Hill. (On3.com)