Associate Editor for IEEE TPAMI, since 2020

Associate Editor for the Journal of Computer and System Sciences, since 2014

Co-editor (with Ronald Ortner and Hans U. Simon) of the Proceedings of the 27th International Conference on Algorithmic Learning Theory (ALT 2016), Lecture Notes in Artificial Intelligence, Springer 2016.

Co-editor (with Kamalika Chaudhuri and Claudio Gentile) of the Proceedings of the 26th International Conference on Algorithmic Learning Theory (ALT 2015), Lecture Notes in Artificial Intelligence 9355, Springer 2015.

Co-editor (with Peter Auer, Alexander Clark, and Thomas Zeugmann) of the Proceedings of the 25th International Conference on Algorithmic Learning Theory (ALT 2014), Lecture Notes in Artificial Intelligence 8776, Springer 2014.

Co-editor (with Osmar Zaïane) of the Proceedings of the 26th Canadian Conference on Artificial Intelligence (AI 2013), Lecture Notes in Artificial Intelligence 7884, Springer 2013.

Guest co-editor (with Gábor Lugosi) of the special issue on ALT 2009,
Theoretical Computer Science 412(19), 2011

Co-editor (with Ricard Gavaldà, Thomas Zeugmann, and Gábor Lugosi) of the Proceedings of the 20th International Conference on Algorithmic Learning Theory (ALT 2009), Lecture Notes in Artificial Intelligence 5809, Springer 2009.

Guest co-editor (with John Case, Takeshi Shinohara, and Thomas Zeugmann) of the special issue on 40 years of Inductive Inference,
dedicated to Rolf Wiehagen on the occasion of his 60th birthday,
Theoretical Computer Science 397(1-3), 2008
Chair of the Steering Committee of the International Conference on Algorithmic Learning Theory (ALT), 2015-2018

Local co-organizer (with Csaba Szepesvári) of the 26th International Conference on Algorithmic Learning Theory (ALT 2015) and the 18th International Conference on Discovery Science (DS 2015)

Conference Chair of the 25th International Conference on Algorithmic Learning Theory (ALT 2014)

Co-chair (with Frank Stephan) of the Steering Committee of the International Conference on Algorithmic Learning Theory (ALT), 2013-2015

Member (publicity chair) of the Steering Committee of the International Conference on Algorithmic Learning Theory (ALT), since 2008

Publicity chair for the 23rd Annual Conference on Learning Theory, COLT 2010, Haifa, June 27-29, 2010


Program Committee Memberships

PC co-chair (with Osmar Zaïane) for the 26th Canadian Conference on Artificial Intelligence, AI 2013, Regina, May 28-31, 2013.

PC co-chair (with Gábor Lugosi) for the 20th International Conference on Algorithmic Learning Theory, ALT 2009, Porto, October 3-5, 2009.

Further PC memberships:

36th Annual Conference on Learning Theory (COLT 2023)

34th International Conference on Algorithmic Learning Theory (ALT 2023)

37th AAAI Conference on Artificial Intelligence, Meta-Reviewer (AAAI 2023)

35th Annual Conference on Learning Theory (COLT 2022)

33rd International Conference on Algorithmic Learning Theory (ALT 2022)

34th Annual Conference on Learning Theory (COLT 2021)

35th AAAI Conference on Artificial Intelligence, Meta-Reviewer (AAAI 2021)

30th International Conference on Algorithmic Learning Theory (ALT 2019)

29th International Conference on Algorithmic Learning Theory (ALT 2018)

International Joint Conference on Artificial Intelligence, Senior PC (IJCAI 2018)

30th Annual Conference on Learning Theory (COLT 2017)

20th International Conference on Artificial Intelligence and Statistics (AISTATS 2017)

30th Annual Conference on Neural Information Processing Systems (NIPS 2016)

27th International Conference on Algorithmic Learning Theory (ALT 2016)

28th Annual Conference on Learning Theory (COLT 2015)

27th Annual Conference on Learning Theory (COLT 2014)

25th International Conference on Algorithmic Learning Theory (ALT 2014)

27th Canadian Conference on Artificial Intelligence (AI 2014)

24th International Conference on Algorithmic Learning Theory (ALT 2013)

Workshop on Heuristics and Search for Domain-Independent Planning, HSDIP at ICAPS 2013

26th AAAI Conference on Artificial Intelligence (AAAI 2012)

23rd International Conference on Algorithmic Learning Theory, ALT 2012

5th Symposium on Combinatorial Search, SoCS 2012

22nd International Joint Conference on Artificial Intelligence, IJCAI 2011 (Senior Program Committee)

22nd International Conference on Algorithmic Learning Theory, ALT 2011

24th Canadian Conference on Artificial Intelligence, Canadian AI 2011

21st International Conference on Algorithmic Learning Theory, ALT 2010

Symposium on Combinatorial Search, SoCS 2010

22nd Annual Conference on Learning Theory, COLT 2009

21st International Joint Conference on Artificial Intelligence, IJCAI 2009

19th International Conference on Algorithmic Learning Theory, ALT 2008

25th Annual International Conference on Machine Learning, ICML 2008

23rd AAAI Conference on Artificial Intelligence, AAAI 2008

31st Annual German Conference on Artificial Intelligence, KI 2008

20th Australian Joint Conference on Artificial Intelligence, AI 2007

2nd International Conference on Knowledge Science, Engineering and Management, KSEM 2007

17th International Conference on Algorithmic Learning Theory, ALT 2006

1st International Conference on Knowledge Science, Engineering and Management, KSEM 2006

2nd Workshop on Learner-Oriented Knowledge Management & KM-Oriented E-Learning, LOKMOL 2006

1st Workshop on Learner-Oriented Knowledge Management & KM-Oriented E-Learning, LOKMOL 2005

15th International Conference on Algorithmic Learning Theory, ALT 2004


Reviewing for scientific journals

Referee for the journals Information and Computation, Theoretical Computer Science, Journal of Symbolic Logic, Information Processing Letters, Artificial Intelligence, Machine Learning, Journal of Machine Learning Research, Knowledge and Information Systems, and others