After graduating from Northwest in 1998 he was a graduate assistant in 1998 at
Northeastern State University in Oklahoma. He returned to Northwest as a graduate assistant in 1999 when Bearcats won their second national championship in 1999. He received his master's degree from Northwest in 2000. He held a position as offensive line coach at
Dakota State University in 2000 and offensive coach at
William Jewell College from 2001 to 2003. In 2004, he returned to Northwest and held offensive positions as the team made five consecutive national championship appearances in 2005-2009 including a national championship in 2009 (a year in which the Bearcats averaged 42 points and 474 yards per game). After winning the 2016 Division II Championship, Dorrel announced he will be leaving the Bearcats to become head coach at
Abilene Christian University. Following a 5–6 campaign in the 2021 season, Abilene Christian relieved Dorrel of his coaching duties. Dorrel ended with an overall record of 19-32 at Abilene Christian. On December 5, 2021 Dorrel became the head coach of
Central Oklahoma. He led the team to its first playoff berth in over 20 years in just his third season and was named Super Region III Coach of the Year in 2024. ==Head coaching record==