coetzee represented at various youth levels, playing at the under-16 grant khomo week in 2008, the under-18 academy week in 2009 and the under-18 craven week in 2010. he joined the western province rugby institute in 2011 and played for in the 2011 under-19 provincial championship competition and for in the 2012 and 2013 under-21 provincial championship competitions, winning the competition in 2013 and scoring two tries during the season.