 Robertson retired from football in 2001 but was back playing in 2002 when he was appointed player/assistant manager of Scottish Football League club Montrose.He scored his first and only goal for Montrose in a 3–2 defeat at Cowdenbeath in the Scottish League Cup.His playing career with Montrose was cut short, however, due to one of his Achilles tendons snapping during a match against Greenock Morton in the same year.