In 1838 Netzer debuted with his compositions in the Wiener Hoftheater. The concert was a hugesuccess and he got the opportunity to present his second symphony in E-Major in another concert. Because of this accomplishmentsAnton Diabelliprinted his first songs "To the lute", "To the moon", "My luck" and "Hakon's song". In 1841 Netzer composed the opera "Mara", premiered at the "Wiener Hofoperntheater" by the Hofopernorchester. The premiere was Netzers breakthrough and "Mara" is nowadays his most famous opus. He worked as conductor in Vienna, Mainz, Leipzig and Graz, where he conducted the first performance of an opera by Richard Wagner in the Austro-Hungarian Empire.