In 1979, he became a freelancer in the field of reportage and music history at Radio DDR, Leipzig station.
During this period (1987), Lieberwirth was awarded a dissertation, supervised by Reinhard Szeskus, submitted to the Scientific Council of the University of Leipzig, Faculty of Cultural, Linguistic and Educational Sciences and prepared by the Art and Cultural Sciences Section of the Faculty of Musicology-Music Education dissertation A "Der Sozialstatus der Musiker in städtischen Diensten vom Beginn ihrer Sesshaftwerdung bis zum 19.
Jahrhundert im sächsisch-thüringischen Raum" (The Social Status of Musicians in Municipal Services from the Beginning of their Settlement to the 19th Century in the Saxon-Thuringian Region)[1] earned him a Dr. phil.
As a consultant, he participated in international symposia in Amsterdam, Bratislava, Leipzig, Linz, Prague and other cities.
[2] After the fall of the Berlin Wall in 1990, Lieberwirth became editor at the Neue Musikzeitung, responsible for the states of Brandenburg, Mecklenburg-Western Pomerania, Saxony, Saxony-Anhalt and Thuringia.