He made his debut in 1991 at the age of 20 as Belmonte in Mozart's "Die Entführung aus dem Serail" for the Roodeport City Opera. In 1996, he started an engagement at the Gärtnerplatztheater in Munich. Since the year 2000 van Rensburg has been working regularly with the Lautten Compagney Berlin (director: Wolfgang Katschner). With this ensemble he staged Monteverdi's "L'Orfeo" and published three recordings. Since 2011 van Rensburg collaborates with a different emsemble for Ancient and New Music, called "così facciamo". With them he staged Handel’s "Ariodante".