Following his AFL career, he joined Collegians Football Club in the VAFA competition, before retiring at the end of the 2023 season.

He became a solid and dependable defender and had been selected for the VFL in state representative matches on three occasions.

In 2013, Mirra led Box Hill to a grand final win after club captain, Daniel Pratt, was unable to play because of injury.

[3] He has been named in the VFL team of the year four times and won the club best and fairest in 2016 having previously been runner-up on four occasions.

[5] Mirra played 7 games in his debut season including the semi-final loss to Melbourne.