Rupert Hochleitner has a PhD in Mineralogy. His area of specialization is systematic mineralogy. Other research areas are meteorites, in particular those of the planet Mars, oxidation minerals, and pegmatitic phosphate minerals. He has published numerous scientific articles and was for a long time editor-in-chief of the journal LAPIS, a specialist magazine for mineral collectors and mineral lovers. Since 1993, he has been deputy director of the Mineralogical State Collection Munich.