On his return he was appointed in 1860 professor of mineralogy and geology at the Imperial-Royal Polytechnic Institute in Vienna, and in 1876 he was made superintendent of the Imperial Natural History Museum.
On his return he was appointed in 1860 professor of mineralogy and geology at the Imperial-Royal Polytechnic Institute in Vienna, and also became the tutor of Rudolf, Crown Prince of Austria. In 1876 he was made superintendent of the Imperial Natural History Museum.