Wilson's talent ensured that he became a part of the Australian national team with basis in Italy. He was diagnosed however with Hodgkins disease in 1999 and he moved back to Australia. After the cancer treatment, he decided however to take up cycling again. His friend and Unibet team mate Baden Cooke helped him to get a place in the professional stable Mercury-Viatel.
He won a stage in Tour de l' Avenir 2001. The following year he and Baden Cooke changed to Française des Jeux.
At the start of 2003, Wilson won the Australian road race championship.
He won the Herald Sun Tour in October 2007 winning 2 stages along the way. He also said it was his most important and favourite victory in his life.