Emanuel previously was an assistant with the Boilermakers from 1997 to 2004. He coached the defensive tackles (1997-99) and defensive ends (2000-04) and also served as assistant head coach for his final two seasons. Emanuel and head coach Danny Hope worked together under former head coach Joe Tiller from 1997 to 2001.
In his first season back at Purdue, Emanuel mentored a defense that finished first in the Big Ten Conference in both sacks (33.0) and tackles for loss (91.0), while also helping to improve Purdue's rushing defense that finished last in the league in 2009 to a respectable sixth in 2010. The Boilermakers surrendered 426 less rushing yards in 2010 than the previous season, an average of 35.5 fewer yards per game.
Emanuel also capped the development of All-American Ryan Kerrigan in 2010. In his lone season in working with the standout defensive end, Emanuel helped Kerrigan lead the nation tackles for loss, the conference in sacks and earn Big Ten Defensive Player and Lineman of the Year honors, as well as the first unanimous All-America recognition by a Boilermaker defender in school history.
Emanuel returned to Purdue from Rutgers, where he was defensive line coach in 2008 and 2009. He left the Boilermakers to coach the defensive line with the San Francisco 49ers and, after two years in the National Football League, coached at San Jose State in 2007.
In his previous stint at Purdue, the Boilermakers ranked seventh or better in rushing defense in the Big Ten each year, including second in 2004 and third in 2000, 2001 and 2003. Their averages of 96.4 and 105.3 yards allowed per game in 2003 and 2004 ranked 10th and 14th nationally. Emanuel coached all-conference performers and National Football League players. End Akin Ayodele was named first team All-Big Ten in 2001 and has played eight seasons in the NFL with the Jacksonville Jaguars, Dallas Cowboys and Miami Dolphins. End Shaun Phillips earned first team All-Big Ten honors in 2003 and has played six seasons with the San Diego Chargers. End Anthony Spencer played under Emanuel for three seasons and went on to become first team All-Big Ten in 2006 and the Dallas Cowboys' first-round draft pick in 2007. Tackle David Nugent was a three-year NFL veteran with the New England Patriots and Baltimore Ravens.
Emanuel was one of 26 coaches invited to participate in the NCAA's annual Expert Coaches Academy in 2007. He has had five internships/fellowships with NFL teams: Buffalo Bills (1992), Chicago Bears (1995), Cleveland Browns (1999), Arizona Cardinals (2000) and Oakland Raiders (2001).
Before his initial Purdue stint, Emanuel was defensive line coach at Washington State from 1994 to 1996. In 1994, the Cougars ranked second in the NCAA in total defense (229 yards per game), third in scoring defense (12.1) and third in rushing defense (73.8).
From 1991 to 1993, Emanuel served in the same capacity at Syracuse, helping the defense rank 11th and fifth in the NCAA in 1991 and 1992. He was an assistant coach at Dartmouth (defensive line) from 1988 to 1991, at Massachusetts (outside linebackers) from 1986 to 1988, at West Chester (defensive line) in 1985 and 1986 and at Plymouth State (offensive coordinator, offensive line) from 1981 to 1984. Emanuel served as Plymouth State's head basketball coach from 1983 to 1985.
All told, Emanuel has coached 12 players who have gone on to play in the NFL and has been part of 12 teams that played in bowl games, including eight at Purdue.
A native of New London, Conn., Emanuel (born Oct. 30, 1958) attended Westchester Community College in Valhalla, N.Y., from 1976 to 1978. He started at offensive guard both years, serving as team co-captain and earning first team junior college All-America honors as a sophomore. He played in the 1977 Junior College Coastal Conference All-Star game. Emanuel then moved on to Plymouth State to earn a bachelor's degree in physical education in 1982. He played football there for two years, but his career was slowed by a knee injury during his junior season. His wife's name is Angela.