 After graduation, he worked as a research assistant at the Institute for Theoretical Electrical Engineering and Electrical Measurement.In 1978, he graduated with a dissertation on contactless three-dimensional object measurement ("Verfahren zur automatischen Vermessung räumlicher Objekte durch rechnergestützte Auswertung stereoskopischer Fernsehbilder").He completed his habilitation in 1982 in the field of Electronic Design Automation (EDA), "Topologische Prüfung komplizierter geometrischer Strukturen".