- 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)
- 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)
Information retrieval
