 In December 2007, Dunn was enlisted as defensive coordinator at New Mexico State University, serving under head coach Hal Mumme, who compiled a 7–29 record.In December 2008, Mumme was fired, and was later hired as head coach of McMurry University in Texas.Dunn joined Mumme's staff in April 2009 at the Division III school, and served as defensive coordinator through the 2012 season.