 At the end of 2012, Isbell received a call-up to the South Africa Sevens side for the 2012–13 IRB Sevens World Series and he made his debut at the 2012 Gold Coast Sevens.He also played in the Dubai and South African legs of the competition and won a gold medal at the 2013 World Games.He moved to Nelspruit-based side in 2014.