Sullivan grew up mostly in Southern California and graduated from Cabrillo H.S. in Lompoc, CA in 1985. He then attended the U.S. Military Academy in West Point, NY where he was a two-year letterman in football as a defensive back, and graduated in 1989. He was commissioned as an Infantry Officer upon graduation, later attending the Army Airborne, Ranger, and Air Assault Schools before serving in the 25th Infantry Division.
Sullivan served as the Giants' wide receivers coach, before moving to quarterbacks coach in 2010.
Quarterbacks coach (2010–2011)
His coaching was cited as a major reason for Eli Manning's success in 2010. Manning set franchise records with 339 completions and a 62.9 completion percentage, as well as his second season with over 4,000 yards, but also threw a then career-high 25 interceptions. He remained on the staff as the quarterbacks coach in 2011, coaching Eli Manning to perhaps his greatest statistical season. Manning threw for a career-high 4,933 yards, 29 touchdowns with 16 interceptions, and had a completion percentage of over 60% for the fourth year in a row. The Giants would go on to win Super Bowl XLVI against the New England Patriots 21-17, with Eli Manning being named Super Bowl MVP under Sullivan's coaching.
On February 10, 2012, Sullivan was hired as the Tampa Bay Buccaneers' offensive coordinator. On December 31, 2012, NFL.com reported that Sullivan will be interviewed by the Chicago Bears for the head coaching position after Lovie Smith was fired. On December 30, 2013, Sullivan was fired along with the rest of the Tampa Bay Buccaneers staff after two unsuccessful seasons.
Return to the Giants (2015–17)
Quarterbacks coach (2015)
On December 31, 2014, Sullivan was re-hired as the Giants quarterback coach, reuniting with his former team and quarterback, Eli Manning. Sullivan replaced Danny Langsdorf, who left to take the offensive coordinator job at Nebraska.
On January 14, 2016, Sullivan was promoted to offensive coordinator with the departure of former Giants head coachTom Coughlin, and the hiring of former offensive coordinator Ben McAdoo.
Denver Broncos (2018)
On January 4, 2018, Sullivan was named as the quarterbacks coach of the Denver Broncos, taking over for interim QB coach Klint Kubiak. Following the end of the Broncos season, he was not retained as a member of recently hired head coach Vic Fangio.
Administrative career
On March 19, 2020, Sullivan returned to West Point as the football team's Director of Recruiting.
