 He made his debut for the Scottish senior team in 2003 and has since made over 60 international appearances.He competed at the European Championships, the World Championships and the 2006 Commonwealth Games in Melbourne, where he, and partner John White, were knocked out (8-10 9-2 9-2 3-9 9-6) in the quarterfinals by the eventual champions Lee Beachill and Peter Nicol.In 2010, Leitch appeared at the Commonwealth Games a second time, playing alongside Alan Clyne in the Men's Doubles, and Lisa Aitken in the Mixed Doubles.