In 1994, like a lot of his colleagues, this secondary school science teacher from Wellington, New-Zealand, picked up a whistle to take charge of matches when he realized he wasn't good enough a player.
When you are a FIFA referee living in New-Zealand, you get to see interesting places. Some of the places Peter O'Leary has been to are: the Cook Islands, New Caledonia, the Solomon Islands and American Samoa, to take charge of matches for U-20 and U-17 tournaments and play-offs for the Nations Cup.
Peter O Leary was selected to officiate at the World Cup U-20 2007 in Canada and the one in 2011 in Colombia.
Peter O'Leary went to the World Cup, both (all) New Zealand international referees did. But Hester got a match and O'Leary didn't.
Is it because there has to be at least one referee from the OFC nominated or is he really that good: Peter O'Leary was selected for the 2012 Olympic Tournament and got elected for the WorldCup 2014 in Brazil in which he officiated one match.