Positions
- Member-at-Large, ACM Council (2020 - 2024, 2016 - 2020)
- Chair, ACM Athena Lecturer Award Committee (2023, 2021 - 2022)
- ACM Athena Lecturer Award Committee Chair, Awards Committee (2023, 2021 - 2022)
- Member, ACM Athena Lecturer Award Committee (2022, 2019 - 2021)
- Member, Nominating Committee (2013 - 2015)
- Member, ACM Fellows Committee (2012 - 2015)
- Past Chair, SIGIR (2003 - 2007)
- Chair, SIGIR (1999 - 2003)
- Conferences Approver, SIGIR (1999 - 2003)
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