I was the chair of the ESSLLI Standing Committee that coodinated the organization and programme of the European Summer Schools in Logic, Language and Information from 2007 till 2018.
- Sofia, 2018, with Darja Fiser (SC), Petya Osenova and Kiril Simov (OC) and Laura Kallmeyer (PC)
- Toulouse, 2017, with Laure Vieu (OC) and Shravan Vasishth (PC)
- Bolzano, 2016, with Diego Calvanese and Rafaella Bernardi (OC) and Claire Gardent (PC)
- Barcelona, 2015, with Louise McNally (OC), Gemma Boleda (OC/PC) and Achim Jung (PC)
- Tübingen, 2014, with Gerhard Jäger (OC) and Frank Veltman (PC)
- Düsseldorf, 2013, with Laura Kallmeyer (OC), Wiebke Petersen (OC/PC) and Johan Bos (PC)
- Opole, 2012, with Janusz Czelakowski and Urszula Wybraniec-Skardowska (OC) and Andreas Herzig (PC)
- Ljubljana, 2011, with Darja Fiser (OC) and Makoto Kanazawa (PC)
- Kopenhagen, 2010, Vincent Hendricks (OC) and Valentin Goranko (PC)
- Bordeaux, 2009, with Christian Retoré (OC) Richard Moot (OC/PC) and Uwe Mönnich (PC)
- Hamburg, 2008, with Benedikt Löwe (OC), Hans van Ditmarsch (OC/PC) and Rineke Verbrugge (PC)
I have been involved in the organization of the bi-annual Amsterdam Colloquium from 1991 onwards (as chair from the 10-th, 1995 till the 16-th, 2007), and in many other international conferences, workshops and events.