UNIVERSITY PARK, Pa. - GoPSUsports.com sat down with defensive coordinator Ted Roof in the latest installment of a series of introductory video interviews with Coach O'Brien's staff.  Roof comes to Penn State after spending three seasons as defensive coordinator at Auburn from 2009-'11.

Roof started his coaching career as a graduate assistant at Alabama in 1987.  Roof and Coach O'Brien worked together at both Georgia Tech and Duke.  Take a look at an exclusive interview with Coach Roof with discussions on his first few weeks on the job and some of his defensive philosophies.

VIDEO: Interview with Assistant Head Coach/Receivers Coach Stan Hixon

VIDEO: Interview with Tight Ends Coach John Strollo

VIDEO: Interview with Secondary Coach John Butler

VIDEO: Interview with Running Backs Coach Charles London