In 1957, Ponta competed at the
Stoke Mandeville Games, the precursor to the
Paralympic Games. He and teammate
Bill Mather-Brown won a gold medal in Foil Novice team at the wheelchair fencing event. In the same year, Ponta and Mather-Brown also competed at the Welsh Challenge Cup, where the pair also won gold. Ponta competed in five Paralympic Games, including the first one held in Rome in 1960. As a Paralympic competitor, he won a gold medal, two silver medals and a bronze medal. He competed in several sports including wheelchair racing, wheelchair fencing, swimming and wheelchair basketball. At the
1960 Summer Paralympics, he competed in the Men's Precision Javelin, where he won a silver medal. He was a member of the Australian wheelchair basketball team at the
1962 Commonwealth Paraplegic Games in Perth. At the
1964 Summer Paralympics in Tokyo, Ponta competed in Class 2 Men's swimming in the 25 m breaststroke event, where he failed to medal. At those same games, he also competed in the class 2 Men's 25 m Freestyle Supine event, where he won a gold medal. He also competed in wheelchair fencing at the 1964 Games in the Eppee Team event, where he did not medal, and the Men's Foil Novice Individual, where he won a silver medal. At the
1968 Tel Aviv Games, he competed in the Class 2 Men's 25 m Breaststroke event, where he failed to medal. He also competed in the Men's 25 m Backstroke, where he won a bronze medal. He also competed in the 100 m Wheelchair race, the pentathlon complete, precision javelin open, slalom a, and in the wheelchair basketball team. He did not medal in any of these events. He competed without winning a medal at the
1972 Heidelberg Games in the discus, javelin, precision javelin, and the wheelchair basketball team. At the
1976 Toronto Games, he competed in the discus, javelin, pentathlon, precision javelin, and shot put events, and was also part of the wheelchair basketball team. He did not medal in any of these events. ==Coaching career==