After the 2017 season ended, Jerry Jones and Jason Garrett decided to make some wholesale changes to the structure of the Dallas Cowboys to avoid another disappointment, if 9-7 can really be called a disappointment. While offensive coordinator Scott Linehan and defensive coordinator Rod Marinelli both remained with the team, much of the staff around them has changed. This series is meant to profile each coach, including the ones who stayed, and analyze how their presence will contribute to the 2018 Dallas Cowboys. Today, we are looking at the man who will be helping Kris Richard remake this secondary, Greg Jackson.