- Co-organizer, Dagstuhl seminar, The constraint satisfaction problem: Complexity and Approximability, July 19-24, 2015.
- Co-organizer, Simons Institute Program on Information Theory, Jan-May, 2015.
- SIGACT Executive Committee Member (since July 2012).
- CCC Conference Committee, July 2012-
- Co-organizer, Summer Thematic Program on Constraint Satisfaction, Fields Institute, July-Aug 2011.
- Associate Editor, SIAM Journal on Computing
- Associate Editor, IEEE Transactions on Information Theory (2011-2014)
- Associate Editor, ACM Transactions on Computation Theory
- Scientific Board, Electronic Colloquium on Computational Complexity
- Area editor, Encyclopedia of Algorithms
- Guest co-editor:
SIAM Journal on Computing (STOC'08 special issue), Computational Complexity (CCC'06 special issue), J. Computer & System Sciences (FOCS'02 special issue)
- Conference Program Committees:
- ISIT 2012, July 1-6, 2012, Cambridge, MA.
- PC Chair,
CCC 2012, Jun 26-29, 2012, Porto.
- STOC 2011, Jun 6-8, 2011, San Jose, CA.
- CCC 2010, Jun 9-12, 2010, Cambridge, MA.
- SODA 2010, Jan 17-19, 2010, Austin.
- FSTTCS 2008, Dec 9-11, 2008, Bangalore.
- STOC 2008, May 17-20, 2008, Victoria.
- ITW 2008, May 5-9, 2008, Porto.
- LATIN 2008, April 7-11, 2008, in Brazil.
- CATS 2008, January 22-25, 2008.
- APPROX 2007, Aug 20-22, 2007, Princeton.
- ISIT 2006, July 9-14, 2006, Seattle.
- CCC 2006, July 16-20, 2006, Prague.
-
FSTTCS 2005, Dec 15-18, 2005, Hyderabad.
-
FOCS 2005, Oct 23-25, 2005, Pittsburgh.
-
FOCS 2002, Nov 16-19, 2002, Vancouver.
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