[2][10] Following this event, he became Ross' regular rowing partner for purposes of Paralympic qualification, because he was slightly faster than the other contender, John Maclean.

[2] At the June 2012 World Cup in Monaco of Bavaria, he and Ross finished first with a time of 4'10 "34 in the Double Adaptive TAMix event.

[12] At the 2012 Summer Paralympics he teamed with Ross in rowing trunk-and-arms mixed double sculls[2][8][13][14] but they did not medal.

[15] At the 2013 World Championships in Chungju, South Korea, he partnered with Kathryn Ross to win the gold medal in the Mixed Double Sculls TAMix2x.

[19] Bellis and Ross won their third consecutive Mixed Double Sculls TAMix2x title at the 2015 World Championships in Aiguebelette, France.