Editor-in-chief of the International Journal of Approximate Reasoning, Elsevier, since January 2005.

Associate editor of Fuzzy Sets and Systems, Elsevier, since March 2007.

Associate editor of IEEE Transactions on Fuzzy Systems, since May 2012.

Editorial Board member for International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems (IJUFKS), World Scientific, since December 2011.

Associate editor of Applied Computational Intelligence and Soft Computing, Hindawi Publishing Corporation, since October 2008.

Editorial Board Member for Turkish Journal of Fuzzy Systems (TJFS), Turkish Fuzzy Systems Association, since 2010.

Editorial Board Member for Information, Interaction, Intelligence, Cepadues, Toulouse since 2001.

Editorial Board Member for Revue d'Intelligence Artificielle, Hermès, Paris, 2001-2004.

The 3rd International Conference on Belief Functions (BELIEF 2014), 26-29 September 2014, Oxford, UK.

The 15th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems ((IPMU 2014), July 15-19, 2014, Montpellier, France.

The Joint Rough Set Symposium (JRS 2013), October 11-14 2013, Halifax, Canada.

The Fifth International Conference on Knowledge and System Engineering (KSE 2013), 17-19 October 2013, Hanoi, Vietnam. (Program co-chair).

The seventh International Conference on Scalable Uncertainty Management (SUM 2013), Washington DC Area, USA, September 16-18, 2013.

The 8th conference of the European Society for Fuzzy Logic and Technology (EUSFLAT-2013), 11-13 September 2013, Milano, Italy.

3rd International Symposium on Integrated Uncertainty in Knowledge Modelling and Decision Making (IUKM 2013), Beijing, 12-14 July 2013.

The 12th European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU 2013), July 7th -10th, 2013, Utrecht, The Netherlands.

8th International Symposium on Imprecise Probability: Theory and Applications (ISIPTA 2013), Compiègne, France, 2-5 July 2013 (Program Committee Board member).

Sixth International Conference of the Thailand Econometric Society (TES 2013), 10-11 January, 2013, Chiang Mai, Thailand.

10ème Congrès International Pluridisciplinaire Qualité et Sûreté de Fonctionnement (QUALITA'2013), Compiègne, France, 19-22 mars 2013.

5th International Conference of the ERCIM WG on COMPUTING & STATISTICS (ERCIM'12), 1-3 December 2012, Conference Centre, Oviedo, Spain. Co-chair of the special track on Imprecision in Statistical Data Analysis.

6th International Conference on Scalable Uncertainty Management (SUM'12), Marburg, Germany, September 17-19, 2012.

Sixth International Conference on Soft Methods in Probability and Statistics, 4-6 October 4, 2012, Konstanz, Germany.

Fifth International Conference of the Thailand Econometric Society, 12-13 January, 2012, Chiang Mai, Thailand.

Second International Conference on Belief functions, 9-11 May 2012, Compiègne, France. (Conference chair)

Workshop on Fault Diagnosis and Fault Tolerant Control in large scale processing industries, October 6-7, 2011 Porticcio, France.

4th International Conference of the ERCIM WG on COMPUTING & STATISTICS (ERCIM'11), 17-19 December 2011, Senate House, University of London, UK. Co-chair of the special track on Imprecision in Statistical Data Analysis.

Fifth International Conference on Scalable Uncertainty Management (SUM'11), Dayton, OH, USA, October 10-12, 2011.

Seventh International Symposium on Imprecise Probability: Theories and Applications (ISIPTA'11), Innsbruck, Austria, July 25-28, 2011.

International Symposium on Integrated Uncertainty in Knowledge Modeling and Decision Making (IUKM 2011), Hangzhou, China, October 28-30, 2011.

International Conference on Nonlinear Mathematics, Uncertainty and Applications, (NLMUA 2011), Beijing, China, September 7-9, 2011.

Conference of the European Society for Fuzzy Logic and Technology (EUSFLAT - LFA 2011), 18-22 July 2011, Aix-les-Bains, France.

Congrès Interdisciplinaire en Qualité et Sûreté de Fonctionnement (QUALITA 2011), Angers, France, March 23-25, 2011.

Eleventh European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU '11), Belfast (Northern Ireland, UK), June 29-July 1, 2011.

3rd International Conference of the ERCIM WG on COMPUTING & STATISTICS (ERCIM'10) 10-12 December 2010, Senate House, University of London, UK.

26th Conference on Uncertainty in Artificial Intelligence (UAI 2010), Catalina Island, California, USA, July 8-11, 2010.

Fourth International Conference on Scalable Uncertainty Management (SUM 2010), Toulouse, France, September 28 - 30, 2010.

5-th International Conference on Soft Methods for Probability and Statistics (SMPS '10), European Centre for Soft Computing Mieres (Asturias), Spain, September 28 - October 1, 2010.

Workshop on the Theory of Belief Functions (http://www.ensieta.fr/belief2010), Brest, France, April 1-2, 2010.

International Symposium on Integrated Uncertainty Management and Applications (IUM 2010), Ishikawa, Japan, 9-10 April 2010.

International Symposium on Information Processing and Management of Uncertainty in Knowledge-Based Systems (IPMU 2010), Dormund, Germany, 28 June-02 July 2010.

Second Workshop of the ERCIM Working Group on Computing & Statistics (ERCIM '09), Limassol, Cyprus, October 2009.

2009 International Fuzzy Systems Association World Congress and 2009 International Conference of the European Society for Fuzzy Logic and Technology (IFSA2009/EUSFLAT09), Lisbon, Portugal, July 2009.

Sixth International Symposium on Imprecise Probabilities and Their Applications (ISIPTA '09), Durham, United Kingdom, July 2009.

2009 IEEE Symposium on Computational Intelligence in Multicriteria Decision-Making (MCDM '09), Nashville, TN, March 30-April 2, 2009.

Tenth European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU '09), Verona (Italy), 1-3 July 2009.

Colloque STIC et Environnement 2009, Calais, France, 16-18 June 2009.

Rencontres Francophones sur la Logique Floue et ses Applications (LFA'2008), Lens, France, 16-17 October 2008.

Fourth International Conference on Soft Methods for Probability and Statistics (SMPS '08), Toulouse, France, September 2008.

First Workshop of the ERCIM Working Group on Computing & Statistics (ERCIM '08), Neuchâtel, Switzerland, 19-21 June 2008.

International Symposium on Information Processing and Management of Uncertainty in Knowledge-Based Systems (IPMU '08), Málaga, Spain. June 22-27, 2008.

Workshop “Surveillance Sûreté et Sécurité des Grands Systèmes” (3SGS'08), Troyes, 4-5 juin 2008.

Rencontres Francophones sur la Logique Floue et ses Applications (LFA'2007), Nîmes, france, 22-23 November 2007.

Ninth European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU '07), Hammamet, Tunisia, October 2007.

IEEE International Conference on Fuzzy Systems (FUZZ-IEEE 2007), London, UK, 23-26 July, 2007.

Fifth International Symposium on Imprecise Probabilities and Their Applications (ISIPTA'2007), Prague, Czech Republic, July 2007.

Tenth Int. Conf. on Information Fusion (Fusion'2007), Quebec, Canada, 9-10 July 2007.

The 2007 IEEE Symposium on Computational Intelligence in Multi-Criteria Decision-Making (MCDM 2007), Honolulu, Hawaii, USA, April 1-5, 2007.

Information, Decision and Control (IDC'2007) , Adelaide, Australia, February 2007.

The IEEE International Conference on Fuzzy Systems (FUZZ-IEEE'2006), Vancouver, Canada, July 2006.

Ninth International Conference on Information Fusion (FUSION'2006), Florence, Italy, July 2006.

Eleventh International Symposium on Information Processing and Management of Uncertainty in Knowledge-Based Systems (IPMU'2006), Paris, France, July, 2006.

Quatrième Colloque STIC et Environnement 2006, Narbonne, France, April 2006.

Eighth European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU'2005), Barcelona, Spain, July 2005.

The 7th International Conference on Information Fusion (FUSION'2004), Stockholm, Sweden, 28 June-1 July 2004.

Tenth International Symposium on Information Processing and Management of Uncertainty in Knowledge-based Systems (IPMU'2004), Perugia, Italy, July 2004.

The 7-th European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU'2003), Aalborg, Denmark, July 2003.

Colloque STIC et Environnement 2003, Rouen, France, June 2003.

The IEEE International Conference on Fuzzy Systems (FUZZ-IEEE'2003), St. Louis, MO, May 2003.

The 9th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems (IPMU'2002), Annecy, France, July 2002.

The IEEE International Conference on Fuzzy Systems (FUZZ-IEEE'2002),Honolulu, Hawaii, May 2002.

13ème Congrès Francophone AFRIF-AFIA de Reconnaissance des Formes et Intelligence Artificielle, Angers, France, January 2002.

Sixth European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU'2001), Toulouse, France, September 2001.

Fifteenth Conference on Uncertainty in Artificial Intelligence (UAI'1999), Stockholm, Sweden, July 30-August 1, 1999.

Rencontres Francophones sur la Logique Floue et ses Applications (LFA), each year since 1999. Member of the steering committee.

Artificial Neural Networks in Engineering (ANNIE), Saint-Louis, MO, each year from 1991 to 2004.