Mayberry has won medals at IPC Alpine Skiing World Cup events and the Paralympic Games. He made his Australian national team debut in 2005 at the European Cup Finals, and went on to represent Australia the following year at the 2006 Torino Games where he failed to medal in the four men's standing events he competed in. He finished 33rd in the downhill, 21st in the Giant Slalom, 19th in the Slalom and did not finish in the Super G. Mayberry attributed his poor performance at the 2006 Games to his prosthetic legs, which "just didn't feel right during the speed events in Italy." Following those Games, he worked with prosthetist Peter Farrand to develop new legs that would address the problems in Italy. Continuing to ski following the 2006 Games, he earned a gold medal at a World Cup event in 2007 in Slalom, and earned a bronze medal in slalom event at a 2008 World Cup competition.