She plans to move up from the bikini competition - in which participants aspire to look like more athletic, toned Victoria's Secret models - to the body shape classification for another association's contest in Auckland in this month.
But first she wants to dispel some myths about the bikini competitions.
"It's good for people to know that it is different to bodybuilding - you don't have to do all the poses," said O'Neill.
"It is a sport, because you train so hard for it. It's not just a bikini competition."
Competing does not come cheap but O'Neill said spending $220 for a stage bikini alone was well worth it, given the motivating factor of preparing for a big event.
"I want to show people that having a goal is essential to getting the best results and leading a healthy, fit and active lifestyle."