Gavin Noble (31) was born in Enniskillen, Co Fermanagh.
Noble competes mostly in ITU sanctioned races. He represented Northern Ireland at the 2002 & 2006 Commonwealth Games and Ireland in European Cup and World Cup campaigns.
He is Ireland's number one male triathlete since 2002 will be the first Irish male to compete in the sport at an Olympic Games.
In action on 7 August, start time is 11.30am.