Mason has had consistently strong performances in international competitions. In the 2005 Australian Championships, she was second, continuing to be selected for the Australian World Championships team. At the 2005 World Championships in Baku, Azerbaijan, she competed in only three out of four apparatus but was ranked 64th overall, while the next Australian, Naazmi Johnston, was ranked in 94th. In the 2006 Melbourne Commonwealth Games, Mason earned two individual medals (2nd ball, 3rd clubs) and a team medal.