2020: Organizer of a special session on Algorithmic learning theory at the conference Computability in
Europe CiE 2020, Salerno 29 June-3 July (co-organizer: Frank Stephan).
2016: Scientific Committee of the interdisciplinary
conference Interactive Imagination, Roma 6-8 Giugno 2016, Istituto
Svizzero di Roma.
2012: Organizer of the conference Limits of Theorem Proving 2012, Roma 25-27 Settenbre (co-organizers:
Olaf Beyersdorff, Nicola Galesi, Toniann Pitassi).
2011: Organizer of workshop Ramsey Theory in Logic, Combinatorics and Complexity (RaTLoCC II), Bertinoro International Center for Informatics, with Nicola Galesi, Pavel Pudlak, Vojtech Rodl, Matteo Viale and Andreas Weiermann.
2010: Programm Committee of workshop Recent advances in unprovability, University of Ghent, Department of Mathematics, September 6-9.
2006: Organizer of Oberwolfach mini-workshop nb. 0648b, Logic, Combinatorics, and Independence Results, with Andrey Bovykin and Andreas Weiermann. (The report of the meeting appeared in the series Oberwolfach Reports, Volume 3, Issue 4, 2006, pp. 3087 - 3130.)