• Distinguished University Professor Artificial Intelligence and Information Retrieval, University of Amsterdam (since 2018)
  • Director, Innovation Center for Artificial Intelligence (ICAI) (since 2018)
  • Distinguished Visiting Professor, Tsinghua University (2021-2024)
  • Member of the Board, Stichting Bèta Plus (since 2014-2024)
  • Adjunct Chair Professor, Shandong University (2019-2022)
  • Vice President Personalization and Relevance, Ahold Delhaize (2020-2021)
  • Full Professor Information processing and internet, University of Amsterdam (2004-2018)
  • Director, Amsterdam Data Science (2014-2017)
  • Associate Professor, University of Amsterdam (2001-2004)
  • Assistant Professor, University of Amsterdam (1998-2001)
  • Warwick Research Fellow, University of Warwick (1996-1997)
  • Postdoc, CWI (1994-1995)