From wikipedia - my favorite source
Bradly joined the North Dakota State Bison as a graduate assistant coach in 1990 and was there until 1991. He was the defensive coordinator/linebackers coach Fort Lewis College from 1992 to 1995 and spent four months as the teams head coach from December 1995-March 1996. From 1996 to 2005 Bradley returned to North Dakota State and coached in many positions including defensive coordinator, linebackers coach, and assistant head coach. Under Bradley’s guidance, North Dakota State’s defense led the Great West Football Conference in scoring defense (13.7 ppg), pass defense (150.3 ypg), total defense (272.4 ypg) and turnover margin (+1.00) in 2005.