Pethtel was the head college football coach for the North ParkVikings located in Chicago, Illinois. He held that position for 7 seasons, from 2006 until 2012. His coaching record at North Park was 10 wins and 60 losses. As of the conclusion of the 2012 season, this ranks him #3 at North Park in total wins and #11 at the school in winning percentage (.143). While at North Park, he grew the team from 30 players to around 90 players and increased average grade point average from 1.95 to 2.89.
Pethel resigned his position at North Park on November 16, 2012. As of 2013, he is an assistant coach for the BuffaloBulls.