Long-time member of Andy Reid's coaching staff for the Philadelphia Eagles who earned his first head coaching opportunity with the Buffalo Bills in 2017. From 2011 to 2016, he was the defensive coordinator for the Carolina Panthers.
He was an All-Southeastern Pennsylvania defensive back for La Salle College High School. He was a two-time national prep champion wrestler as well.
He graduated with a bachelor's degree in finance from the College of William and Mary.
His father was a high school football coach. He has an older brother Tim who served as Chief Business Officer of the Philadelphia Union Major League Soccer franchise.
He took over the Bills head coaching position after Buffalo fired Rex Ryan.