From 2007 to 2013 Tunevitsch was selected to represent Tasmania in the men's lightweight four contesting the Penrith Cup at the Interstate Regatta within the Australian Rowing Championships.

The following year at the 2007 World Rowing U23 Championships in Glasgow with only one crew change Tunevitsch again raced in the quad to a fourth placing.

[5] In 2008 Tunevitsch was elevated to the Australian senior lightweight squad and he raced in the men's eight who placed eighth at the World Championships in Linz.

[5] The Australian lightweight eight stayed together into 2011 with the changeout of Perry Ward and Angus Tyers for Rod Chisolm and Tom Gibson and a move of Darryn Purcell into the stroke seat.

[5] In 2012 at Rowing World Cups II and III in Lucerne and Munich Tunevitsch raced a coxless pair with Alister Foot to two bronze medal placings.