Stubler has head coaching experience in the CFL with the Toronto Argonauts in 2008 where he went 4-6 in ten games, and has also been a defensive co-ordinator with the Hamilton Tiger-Cats (1983-1989), the Toronto Argonauts (1990, 2003-2007), the Edmonton Eskimos (1991-1995, 1998-1999 and 2011) and the British Columbia Lions (2000, 2012-13).
Stubler was also in charge of the Lions' defensive line in 2010 and has been the defensive co-ordinator at the National Collegiate Athletic Association level with the University of Oregon and Colorado State.
Stubler is known for having his defensive tackles and defensive ends step a yard or two yards away from the line of scrimmage so it gives his defensive lineman more vision on the football field. He replaces Rick Campbell who became the head coach of the Ottawa RedBlacks.
Stubler has won four Grey Cups--with the Hamilton Tiger-Cats in 1986, with the Edmonton Eskimos in 1993, the British Columbia Lions in 2000 and with the Toronto Argonauts in 2004.