With more than 40 years of coaching experience, including 28 on the Division I level, Dunn has been a coach on four conference champions and 13 bowl teams.
Dunn joined Purdue after spending the previous four seasons (2013-16) at Western Kentucky, where he served as the defensive line coach and recruiting coordinator. He was on staff for the Hilltoppers' back-to-back Conference USA championships (2015 and 2016) and three consecutive bowl victories (2014 Bahamas Bowl, 2015 Miami Beach Bowl and 2016 Boca Raton Bowl). He helped WKU improve its scoring defense from 121st nationally in 2014 (39.9) to 41st in 2016 (24.6), its total defense from 120th (509.9) to 41st (376.6) and its rushing defense from 111th (220.8) to third (97.2) among Football Bowl Subdivision schools.
Prior to WKU, Dunn spent three seasons (2010-12) as the director of high school relations and assistant strength coach at Texas Tech under Tommy Tubberville, after spending 10 seasons as the defensive line coach with Tubberville at Auburn (1999-2008). The Tigers finished first (2004), sixth (2005) and seventh (2006) in the nation in scoring defense with Dunn on staff and earned a berth in the 2005 Sugar Bowl.
Dunn served as Mississippi's defensive line coach from 1995 to 1998, was the co-defensive coordinator and defensive line coach at Nevada in 1994 and spent four seasons at Pacific (1990-93), where he was assistant head coach and co-defensive coordinator (1992-93), defensive line coach (1990-93) and special teams coach (1990-91).
From 1985 to 1989, Dunn was Montana State's defensive line coach, recruiting coordinator and special teams coach. He got his start in Division I football as a graduate assistant coach at Tennessee from 1983 to 1984. He also coached at his junior college alma mater Lees-McRae in Banner Elk, North Carolina, from 1980 to 1982.
Dunn began his career at the high school level at David Crockett High School (1976) in Jonesboro, Tennessee, and Holston High School (1977-79) in Knoxville, Tennessee. He was a health and physical education teacher at both high schools and was the strength coach at Holston.
Dunn earned an associate's degree from Lees-McRae in 1973, a bachelor's degree in physical education from East Tennessee State in 1976 and a master's degree in secondary education from Union College in 1980.
Dunn and his wife, Dona, have a son, Jonathan.