In 2006 he teamed up with James Marburg to win the Australian national coxless pair championship beating out the fancied veteran duo of Drew Ginn and Duncan Free.

McKenzie-McHarg was selected in the coxless four alongside James Marburg and Sydney University boatmen Francis Hegerty and Matt Ryan.

Ryan was struck down by illness and had to be replaced for the race by Terrence Alfred and the crew achieved qualification for the Olympic Games.

[4] Following the 2008 Olympic year he continued to figure in contention for national selection and was picked in Australian crews for the next three world championships.

[6] At the 2011 World Championships in Bled, Slovenia, McKenzie-McHarg missed selection for the four and the Men's eight which both qualified for the London Olympic Games.