Dubberley retired from competition in 2006 and in November of that year was appointed as head coach of the Australian Wheelchair Rugby team. He coached the team to a silver medal at the 2008 Beijing Games and the 2010 World Wheelchair Rugby Championships. He is preparing the team for the 2012 London Games. He coached the Australian national wheelchair rugby team at the 2012 Summer Paralympics, which went through the five-day tournament undefeated and won the gold medal. He was the head coach at the 2016 Rio Paralympics where the team won Gold.