Steering Committee Member, LID (Logic in Databases) series of international workshops (from 2007).
Editor, special issue of Information and Computation consisting of selected TIME 2005 papers.
Associate Editor, ACM Transactions on Database Systems (from 2004).
Member of the Editorial Board, Journal of Applied Logic (from 2004).
Member of the Board of Editors, Information Processing Letters (from 2002).
Editor, ACM SIGMOD DiSC 2001.
Steering Committee Member, TIME series of international conferences (from 2001).