2006/2007 Research Fellow, Collegium Budapest, Institute for Advanced Study, Budapest.
2005: Invited Visiting Scholar, Max Planck Institute for the History of Science, Berlin.
2001-2004: Research Assistant, The Warburg Institute, University of London.
1999-2001: Frances A. Yates Research Fellow, The Warburg Institute, University of London.
1998-1999: Research Associate, Department of History and Philosophy of Science, University of Cambridge.
2006 to present: Department of Medieval Studies, Central European University, Budapest.
2009: Department of Cognitive Science, Budapest University of Technology and Economics.
2006, 2009 to present: Centre for Manuscript and Print Studies, University of London.
1994-1997: Faculty of History, University of Cambridge.
1992-1994, 2003/2004: Department of Medieval European History, Eötvös Loránd University, Budapest.