Played in the 1999, 2003, and 2007 Rugby World Cups, and won the World Cup with Australia in 1999, played in over 60 Tests.
He made his debut for Australia in 1997 in a match against France.
He became an assistant coach for the RaboDirect Melbourne Rebels after his retirement from playing.
His brother, Brent Cockbain, played Rugby Union for Wales.
He was teammates with Al Baxter on the Australian team that finished as runners-up in the 2003 Rugby World Cup.