In 1997/1998, he was a
John F. Kennedy Fellow at the Center for European Studies at
Harvard University. Subsequently, he was a research associate at the Center for Comparative European History at Freie Universität Berlin until 2002. In 2002, he worked as junior professor for Polish and Ukrainian studies at the
European University Viadrina in Frankfurt (Oder), where he published his
habilitation on the political and social function of the opera house in the 19th century. From 2007 to 2010, Philipp Ther held the professorship for Comparative European history at the
European University Institute in Florence. Ther gained recognition as an expert on the history of expulsion and displacement in Europe and publicly criticized the
German Federation of Expellees, whose policies he described as not being aimed at reconciliation even after the end of the
Cold War. The federation's then president
Erika Steinbach subsequently intervened by lodging a complaint with Ther's publishing house
Vandenhoeck & Ruprecht. The publisher released this letter to the public and described it as "brazen meddling" Since 2010, Ther has been a tenured university professor for the history of East Central Europe at the Institute of Eastern European History at the University of Vienna, where he served as the institute's executive director from 2014 to 2018. After receiving the Wittgenstein Award in 2019, he founded the Research Center for the History of Transformations (RECET), an interdisciplinary research institution focusing on transformation processes in Eastern and Central Europe. In July 2022, it became public that a selection committee at
Viadrina University proposed the historian as the only candidate to be elected university president. Philipp Ther rejected the offer in August 2022. Ther's research interests include comparative social and cultural history of the 19th and 20th centuries in Germany and East Central Europe, especially nationalism studies, history of migration, urban history, and the history of music theater. His research focuses on comparative analyses of the history of transformation in Eastern and Central Europe since the 1980s. == Family ==