Coley's college coaching career started at Louisiana State University in 2003, where he was an offensive graduate assistant under offensive coordinator Jimbo Fisher for two seasons. Coley and LSU won the national championship in his first year there, winning the Capital One Bowl in his second year.
Miami Dolphins
Coley joined LSU head coach Nick Saban on the Miami Dolphins coaching staff as an offensive assistant when Saban was hired by the Dolphins prior to the 2005 season. Coley left the Dolphins after the 2006 season when Saban bolted unexpectedly to the University of Alabama.
FIU
Coley spent one season as offensive coordinator at Florida International University under head coach Mario Cristobal and completely revamped the FIU offense. Through the first six contests of the season, Florida International's schedule featured five bowl teams from 2006. With Coley installing his new offense, the Golden Panthers scored a total of 44 points and averaged 211.7 yards of offense per game but that all changed in the second half of the season. In its final six games FIU's offense scored 137 points and averaged 327.7 yards per game. On top of more than tripling its points scored in the second half of the year, Coley's ground game almost doubled its output and the passing offense increased by almost 39%.
Florida State
Coley was hired by FSU head coach Bobby Bowden on February 21, 2008. Coley was reunited with former boss at LSU, Jimbo Fisher. Coley was hired to coach the TEs and to be the new recruiting coordinator at FSU. Coley spent five seasons on the FSU staff, all 5 as the TE coach, and gave up the RC title in 2010 when he was promoted to OC. Dameyune Craig became the new RC. In 2010, Jimbo Fisher was promoted to head coach after Bobby Bowden retired, Fisher promoted Coley to offensive coordinator, though Fisher would still be calling the plays. Coley was known as one of FSU's top recruiters, helping them bring in top recruiting classes nearly every season he was on staff, including back-to-back top 10 classes in 2008 and 2009, the number 1 overall class in the 2011, and the 2nd overall class in 2012 according to ESPN
Miami (FL)
The Miami Hurricanes offered Coley the role of offensive coordinator with full play-calling duty on January 24, 2013. When Al Golden, the Hurricanes' head coach, was fired, Coley left the Hurricanes for the University of Georgia.
Georgia
Coley was hired by Mark Richt's replacement at Georgia, Kirby Smart, on January 3, 2016 to be the program's new wide receivers coach. On January 11, 2019 following the departure of former Georgia offensive coordinator Jim Chaney, he was promoted to offensive coordinator following the 2018 season.