Sheridan was previously the defensive coordinator for the Tampa Bay Buccaneers of the National Football League (NFL).
He had stints with the Miami Dolphins, Tampa Bay Buccaneers and Detroit Lions before returning to NCAA football at Boston College in 2018.
Sheridan replaced Steve Spagnuolo after he left to take the head coaching position with the St. Louis Rams.
He was fired on January 4, 2010, after the Giants defense slipped as the team dropped 8 of their last 11 games and allowed 40 points on five different occasions, a franchise record.
[4] In June, 2016, Sheridan was named to Sports Illustrated's Dream Coaching Team for the NFL for Linebackers.