Линфилд
Neill's father moved to Australia from Northern Ireland, where he had played for local football clubs Brantwood F.C., Linfield F.C., and Cliftonville F.C.. Neill grew up in Manly, Sydney and was a student at Wakehurst Public School in Belrose and St Augustine's College in Brookvale, before attending the Australian Institute of Sport on a football scholarship in 1994–95.