Smith was one of three Ashfield players signed by Dundee United manager Jerry Kerr in 1966, joining the club in November shortly after teammates Jim Cameron and Gerry Hernon. A versatile player, Smith appeared for the reserve team in a number of positions, initially as a right-half. He made his first team debut in a Scottish Football League match against Kilmarnock on 20 March 1967. He continued to play regularly for the reserves, making only a handful of first team matches over the next four years until establishing himself in the latter part of the 1970–71 season.