Warkentin arrives to the University of Manitoba after working as the Director of Athletics of Canadian Mennonite University (CMU) from 2001-2007. In addition, he held the dual role of men's basketball head coach at CMU. At the end of the 2006-07 season, he was named basketball coach of the year by the Association of Christian College Athletics (ACCA) by guiding the team to a third place finish at the ACCA national tournament in Oklahoma in early March and capturing the Central Plains Athletic Conference (CPAC) championship, defeating the Red River College Rebels 59-57 at the end of March.

The Winnipeg native graduated from University of Manitoba in the Faculty of Physical Education and Recreation Studies in 1992 and Faculty of Arts in 1990.

Prior to CMU, he was the assistant coach of the University of Waterloo Men's Basketball from 1994-2001. Warkentin also worked as an Executive Director of two Provincial Sport Organizations in Manitoba and Faculty Development Officer at the University of Waterloo.

As a fully certified NCCP Level 3 basketball coach, Warkentin has also been very involved in coaching for 18 years including club basketball and in Provincial Team programs in both Ontario and Manitoba.