While O'Halloran is mainly a non-competitive rock climber, he decided to come out of competition retirement in an attempt to make the Olympic team.
He qualified for the 2020 Summer Olympics by winning the combined men's format in the 2020 IFSC Oceania Championships.
[1] O'Halloran finished twentieth in the Qualification round, his best effort being placed seventeenth for speed.
[3] O'Halloran is also notable for competing in two seasons of Australian Ninja Warrior.
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