Kammala wannan jumla: Treacy ya halarci makarantar St Anne's Post-Primary School a Cappoquin, County Waterford, Ireland, yana yin tafiyar sama da mil bakwai zuwa makaranta kowace safiya. Ya kammala karatunsa daga Kwalejin Providence a Amurka. A cikin
1978 da 1979 ya lashe Gasar Cin Kofin Duniya ta IAAF a Glasgow, Scotland da Limerick, Ireland bi da bi.