Career
Hearts
He also made a substitute appearance on the final day of the 2004-2005 season, in a 2–0 defeat at Aberdeen. Airdrie
Tierney signed for Airdrie United after being given a free transfer by Hearts in July 2006. He did not make many appearances for Airdrie United, and in January 2007 he was put out on loan for the rest of the season to Forfar Athletic, making his final professional appearance in a 9-1 defeat by Morton.
Tierney was released by Airdrie in 2007.