2009-10: Vienneau played for the Kingston Voyageurs of the OJAHL. In 35 games for the Voyageurs, Vienneau recorded a 2.16 goals-against average and a .928 save percentage. He turned in a 27-4-1-2 record on the season. In 13 playoff games, Vienneau posted a 9-4 record, along with a 2.56 goals-against average and a .916 save percentage. Played in the CJHL Prospects Event and was named Goalie of the Tournament.