Ku dhammaystiro weedhan soo socda: Treacy wuxuu dhigan jiray dugsiga hoose dhexe ee St Anne's ee Cappoquin, County Waterford, Ireland, isagoo ku ordaya in ka badan toddoba mayl iskuulka subax kasta. Wuxuu ka qalin jabiyay Providence College ee dalka Mareykanka. Sanadkii 1978 iyo
1979 wuxuu ku guuleystay IAAF World Cross Country Championships ee Glasgow, Scotland iyo Limerick, Ireland siday u kala horreeyaan.