Waisea, along with his brother, Avenisi Vasuinubu both played for Melbourne Rugby in the Victoria Rugby Championships. The brothers decided to join the Uprising team in the Uprising 7's tournament held in Fiji in 2012. They played so well that both brothers were selected to join the Fiji 7's team for the 2011–12 IRB Sevens World Series. Waisea was one of the stand-out performers that season scoring 25 tries that season equal with another rising star, Metuisela Talebula. He was selected in the Fiji 15's team for the 2012 IRB Pacific Nations Cup. He made his debut for Fiji against Japan on the right wing and scored a try as well. He scored a try against Scotland two weeks later. He was signed on by French side Stade Français after his performance in the PNC and he made his debut against Montpellier in August 2012. He has played 18 games since joining the side scoring 7 tries. In May 2013, he returned to Fiji to try to win his place back to represent the Fiji 7's team at the 2013 Rugby World Cup Sevens.