Organizer of master class Finite-state techniques in Natural Language Processing during the BCN Summer School, July 1996.
Member of programme committee of Mathematics of Language 5, Dagstuhl, Germany, August 1997.
Member of programme committee of Tabulation in Parsing and Deduction (TAPD'98), Paris, France, April 2-3, 1998.
Member of programme committee of International Workshop on Finite State Methods in Natural Language Processing, Bilkent University, Ankara, Turkey, June 29 - July 1, 1998.
Reviewer for COLING-ACL98, August 10-14, 1998, Université de Montréal, Montréal, Québec, Canada.
Reviewer for EACL99, June 8 - 12, 1999, Bergen.
Reviewer for ACL'99, University of Maryland, June 20 - 26, 1999.
Member of programme committee of Mathematics of Language 6, Orlando, Florida, USA, July 1999.
Reviewer for VEXTAL, Venice, November 22-24, 1999.
Reviewer for COLING 2000, Saarbrücken, Luxembourg, Nancy, July 31 - August 4, 2000.
Member of programme committee of 2nd Workshop on 'Tabulation in Parsing and Deduction', Vigo, Spain, September, 2000.
Reviewer for ACL'2000, 3 - 6 October 2000, Hong Kong.
Reviewer for STACS 2001, February 15-17 2001, Dresden, Germany.
Reviewer for ACL 2001, 6 - 11 July 2001, Toulouse, France.
Reviewer for Developments in Language Theory 2001, 16 - 21 July 2001, Vienna, Austria.
Member of programme committee of Mathematics of Language 7, 13 - 24 August 2001, Helsinki, Finland.
Member of programme committee of Seventh International Workshop on Parsing Technologies, 17 - 19 October 2001, Beijing, China.
Reviewer for ACL 2002, July 7-12, 2002, Philadelphia, Pennsylvania, USA.
Member of the programme committee of the 7th conference on Formal Grammar, at ESSLLI 2002, Trento, Italy, 5-16 August, 2002.
Reviewer for the proceedings of CLIN 2002, November 29th, 2002, Groningen, The Netherlands.
Area chair 'parsing and tagging' for EACL 2003, April 12-17, 2003, Budapest, Hungary.
Member of programme committee of IWPT 2003, 23-25 April 2003, Nancy, France.
Member of programme committee of Mathematics of Language 8, 20-22 June 2003, Bloomington, Indiana.
Reviewer for ACL 2003, Sapporo Convention Center, Sapporo, Japan, July 7-12, 2003.
Member of programme committee of FGVienna, August 16-17, 2003, Vienna, Austria.
Member of programme committee of Algebraic Methods in Language Processing, August 25-27, 2003, Verona, Italy.
Reviewer for ICALP'04, July 12-16, 2004, Turku, Finland.
Reviewer for ACL 2004, Barcelona, Spain, July 21-26, 2004.
Member of programme committee of FGNancy, Nancy, France, 7-8 August 2004.
Reviewer for COLING 2004, August 23-27, 2004, Geneva, Switzerland.
Reviewer for ACL 2005, June 25-30, 2005, Ann Arbor, USA.
Member of programme committee of FG-MOL 2005, Edinburgh, UK, 5-7 August 2005.
Area chair 'Formal NLP' for HLT/EMNLP 2005, Vancouver, B.C., Canada, October 6-8, 2005.
Member of programme committee of Finite-State Methods and Natural Language Processing, Helsinki, 1-2 September 2005.
Reviewer for IJCNLP-05, Jeju Island, Korea, 11-13 October, 2005.
Reviewer for EACL-06, Trento, Italy, April 3-7, 2006.
Reviewer for HLT-NAACL-2006, New York, June 5-7, 2006.
Area chair 'Parsing' for COLING-ACL 2006, Sydney, Australia, July 17-21, 2006.
Member of programme committee of FG-2006, Malaga, Spain, July 29-30, 2006.
Reviewer for EMNLP 2006, Sydney, Australia, July 22-23, 2006.
Reviewer for FoSSaCS 2007, Braga, Portugal, March 24 - April 1, 2007.
Member of programme committee of LATA2007, Tarragona, Spain, March 29 - April 4, 2007.
Reviewer for NAACL-HLT 2007, Rochester, NY, April 22-27, 2007.
Member of programme committee of AutoMathA 2007, Palermo, Italy, June 18-22, 2007.
Member of programme committee of IWPT 2007, Prague, Czech Republic, June 23-24, 2007.
Reviewer for ACL 2007, Prague, Czech Republic, June 23-30, 2007.
Reviewer for EMNLP-CoNLL-2007, Prague, Czech Republic, June 28-30, 2007.
Reviewer for CIAA 2007, Prague, Czech Republic, July 16-18, 2007.
Member of programme committee of FG2007, Dublin, Ireland, August 4-5, 2007.
Member of programme committee of LATA2008, Tarragona, Spain, March 13-19, 2008.
Member of programme committee of LDTA, March/April, 2008.
Reviewer for ACL 2008, Columbus, Ohio, June 15-20, 2008.
Member of programme committee of FG-2008, Hamburg, Germany, August 9-10, 2008.
Reviewer for DLT 2008, Kyoto, Japan, September 16-19, 2008.
Member of programme committee of the 14th conference on Formal Grammar, Bordeaux, France, July 25-26, 2009.
Member of programme committee of International Conference on Parsing Technologies 2009, Paris, France, 7th-9th October, 2009.
Reviewer for ACL-IJCNLP 2009, Singapore, August 2-7, 2009.
Reviewer for EMNLP 2009, Singapore, August 6-7, 2009.
Reviewer for DLT2009, Stuttgart, Germany, June 30 - July 3, 2009
Reviewer for EACL 2009, Athens, Greece, March 30 - April 3, 2009.
Editorial board member for Computational Linguistics 2000-2002.