He is the head football coach for California University of Pennsylvania, a position he has held since 2016.
In his first season as head coach, in 2016, he led the California Vulcans to a Pennsylvania State Athletic Conference (PSAC) championship and a birth in the NCAA Division II Football Championship.
In 2000, the Morehead State Eagles led the NCAA Division I Football Championship Subdivision (FCS) with 41.6 points and 523.9 yards of total offense behind the play of quarterback Dave Dinkins, a native of Pittsburgh.
In 2015, the Dukes finished with an 8–4 overall record and made the program's first appearance in the FCS playoffs.
Dunn helped Duquesne post a winning season five times in his six years with the program, while earning at least a share of three NEC titles (2011, 2013, 2015).