Trevor and his wife, Caroline, run Breen Sport Horses while based in South-East England. Trevor has competed nationally and internationally, enjoying great success since 2007 as a member of the Irish Team. Caroline is an international showjumper and has spent many years with Tim Stockdale. She now manages the training and business side of Breen Sport Horses.
Trevor has represented Ireland many times, including at Lanaken for the World Breeders Federation of Sport Horse Championships. He enjoys producing horses to international standards.