Career
Robertson began his career at Saint Johnstone, where he progressed through the youth ranks with the likes of Danny Griffin and Stuart McCluskey, even playing in the outfield on occasion, and eventually made twelve league appearances for the first team As an understudy to Saints" first-choice "keeper Alan Main, he made his Scottish Premier League debut on 21 February 1998, against Aberdeen. He was called up to the Scotland Under-21 squad in March 2000
Robertson ended his seven-year association with the Perth club in May 2001 when he was released on a free transfer.
He moved to Clydebank.
After only a year there, he joined Stranraer on trial, before joining Airdrie United. He then moved on to Alloa Athletic in June 2010.
Robertson joined Junior side Kirkintilloch Rob Roy in August 2011.