Prior to arriving at Baylor, Orthmann was an assistant coach at Southern Oregon, where he was the running backs and tight ends coach. From 2002-03, he was the associate head coach at Northern Arizona, where he helped lead the Lumberjacks to the 2003 Big Sky Conference Co-Championship and a berth into the 2003 NCAA Division 1-AA Championships.
Before his promotion to associate head coach, Orthmann served as an assistant coach for the Lumberjacks during the 2000 and 2001 seasons, coaching the running back and the tight ends. Orthmann helped lead Northern Arizona to the 2001 NCAA Division 1-AA championships and coached 2001 1-AA All-America Marcus King, who is NAU's all-time leading rusher with 3,794 yards.
In addition to stints at Southern Oregon and Northern Arizona, Orthmann has served as an assistant coach for Montana State (1996-99) and Eastern Washington (1992). He has also coached at the high school level, serving as an assistant at Lake City (Coeur d'Alene, Idaho) and Kennewick (Kennewick, Wash.) high schools.
A native of Kennewick, Wash., Orthmann played for two seasons at Idaho on the offensive line before he suffered a career-ending knee injury. Orthmann holds three degrees from Eastern Washington, a bachelor of arts in history (1990) and education (1996) as well as a master's in business administration (1992).