A strapping fast bowler born in Australia, Johnston's career began at New South Wales where he played alongside the likes of Mark Taylor, Michael Slater and Brett Lee, before choosing to represent Ireland.
A positive captain who led from the front. He led Ireland to a thrilling tie against Zimbabwe in their first match of the 2007 World Cup before beating Pakistan - Johnston hit the winning runs - to record one of the biggest upsets in history.
He won his 100th cap in the Aug 2009 ODI loss to England, when he was named Man of the Match, for 20 not out & bowling figures of 10-2-26-4.
During Ireland's 3 wicket win against England in the 2011 World Cup, Johnston took his 50th ODI wicket when he bowled Michael Yardy and in the process became the first Irish bowler to do so.