Hans Knoll founded the Knoll Gallery in Vienna in the mid-1980s and the Knoll Gallery in Budapest in 1989, the latter being the first private commercial gallery to operate in the Eastern Bloc, which still exists. He is the curator of several international exhibitions, often focusing on Central and Eastern Europe. Between 1995 and 1999 he taught art management at several universities in Vienna, Vilnius and Bucharest, and since 2006 he has been teaching at the University of Music in Vienna. He is the author of the book The Second Advertising – Art in 20th Century Hungary. Since 1990 he organizes art tours in Budapest, Bratislava, Moscow, St. Petersburg and Bucharest. In 2000 he was appointed Federal Curator of Austria for the EXPO 2000 in Hanover. In 2014 he founded the SAY IT project, in which he organizes, together with Anna Khodorkovskaya and Anastasiya Yarovenko, a series of exhibitions followed by discussions in Ukraine, Russia, Hungary, Serbia and Greece.