Dunell played in many positions during his career, including the wing, forward pocket and at full forward. It was in the forward pocket where he played in Essendon's 1984 premiership and he remained with the club until the end of the 1986 VFL season when he returned home to Brisbane and became a member of the Brisbane Bears original squad for the 1987 VFL season. Dunell spent two injury interrupted seasons with Brisbane before retiring at the end of the 1988 season.
Dunell has coached in various leagues since his retirement as a player and is currently coach of Victorian Amateur Football Association (VAFA) club Old Geelong.