[2] Mitchell first represented Australia aged 19 in the lightweight double scull at the 1995 World Rowing U23 Championships at Groningen in The Netherlands where the Australians took the bronze medal.

[3] In 1997 he made his debut in an Australian senior crew – the Lyall McCarthy coached men's lightweight eight.

[3] At the 1999 World Championships in St Catharines Canada, Mitchell rowed a lightweight coxless pair with Wiseman to a seventh place finish.

[3] In 2002 in a crew with the veteran Tasmanian lightweight Simon Burgess, Mitchell raced in the coxless four at a World Rowing Cup in Munich and at the 2002 World Rowing Championships in Seville to a fourth placing.

[3] His final Australian representative selection was in the coxless four which competed at Milan 2003 and placed seventh.