Editor-in-chief of Journal of Functional Analysis.
Editor of Journal of Operator Theory.
Editor of Forum of Mathematics, Sigma.
Editor of Compositio Mathematica.
Editor of Journal de l'École Polytechnique.
Editor of Publicacions Matemàtiques.
Editor of Bulletin of the Belgian Mathematical Society.
(2014-2023) Transactions of the American Mathematical Society and Memoirs of the American Mathematical Society: coordinating editor for Analysis, Lie Theory and Probability; editor for Functional Analysis and Operator Algebras.
(2011-2017) Editor of the generalist science journal Karakter of the Academische Stichting Leuven. This journal is in Dutch.
Workshop C*-Algebras at the Oberwolfach Mathematical Institute, Germany, August 8-12, 2022.
Mini-Symposium Operator Algebras during the 8th European Congress of Mathematics, June 22-24, 2021.
Workshop C*-Algebras at the Oberwolfach Mathematical Institute, Germany, August 11-17, 2019.
Workshop Classification of group von Neumann algebras at the American Institute of Mathematics, San Jose, United States, 29 January 2018 - 2 February 2018.
Conference Von Neumann algebras and measured group theory at the Institut Henri Poincaré, Paris, France, July 3-7, 2017.
Conference C*-Algebras at the Oberwolfach Mathematical Institute, Germany, August 21-27, 2016.
Co-organizer of the IMAGINARY exhibition in Belgium, September 28, 2015 - April 29, 2016.
Conference Noncommutative Geometry at the Centre International des Rencontres Mathématiques (CIRM), Marseille, France, November 2-6, 2015.
Conference Noncommutative Geometry at the Oberwolfach Mathematical Institute, Germany, June 14-20, 2015.
Conference C*-Algebras at the Oberwolfach Mathematical Institute, Germany, August 25-31, 2013.
Conference Von Neumann Algebras and Measurable Group Theory, Leuven, July 1-5, 2013.
Thematic program Von Neumann algebras and ergodic theory of group actions at the Institut Henri Poincaré, Paris, France, from April 18 till July 9, 2011.
Joint meeting of the Belgian and the London Mathematical Society, Leuven, December 4 -- 5, 2009.
Workshop Operator algebraic aspects of quantum groups, Leuven, November 10 -- 12, 2008.
(Since 2021) Chairman of the Faculty Advisory Board (hiring committee) of the Faculty of Science, KU Leuven.
(Since 2020) Chairman of Metaforum, the interdisciplinary think-tank of KU Leuven.
(Since 2017) Chairman and administrator of the Flemish Mathematics Olympiad vzw.
(Since 2011) Head of the Section of Analysis of the Department of Mathematics, KU Leuven.
(2017-2023) European Research Council (ERC) Starting Grant Panel PE1 Mathematics: panel member 2017, panel chair 2019, 2021 and 2023.
(2017-2021) Member of the Faculty Advisory Board (hiring committee) of the Faculty of Science, KU Leuven.
(Since 2018) Administrator of Kaleidi.
(2017-2022) Administrator of Academische Stichting Leuven.
(2012-2020) Chairman of the Doctoral Committee of the Faculty of Science.
(2009-2020) Coordinator of the Junior College STEM at KU Leuven.