Director-At-Large; Board of Directors. Society for Modeling and Simulation International; San Diego, CA. USA. (2018-20).

Member of the Board of Directors. Winter Simulation Conference. (2018-20).

Director-At-Large; Board of Directors. Society for Modeling and Simulation International; San Diego, CA. USA. (2014-7).

Vice-President, Conferences. Society for Modeling and Simulation International; San Diego, CA. USA. (2012-5).

Vice-President, Publications. Society for Modeling and Simulation International; San Diego, CA. USA. (2010-2).

Special Issues Editor of Simulation: Transactions of the Society for Computer Simulation International (SCS). (2008-)

Member of the Editorial Board of IEEE Computing in Science and Engineering (2012-).

Member of the Editorial Board of Wireless Networks (Elsevier; 2009-).

Associate Editor of Journal of Defense Modeling and Simulation (Sage) (2006-).

Member of the Editorial Board of the International Journal of Simulation and Process Modelling (Inderscience). (2004-)

Associate Editor of Simulation: Transactions of the Society for Computer Simulation International (SCS). (2002-8)

IEEE/AIP Computing in Science and Engineering. Discrete Modeling and Simulation Special Issue. Guest Editor (with G. Sirakoulis and J. Was). 18(4): 8-10. 2016.

ACM TOMACS, Transactions on Modeling and Computer Simulation. Guest Editor “Principles of Advance Discrete Simulation. 2015.

Simulation: Transactions of the Society for Modeling and Simulation International. Guest Editor (with Olivier Dalle). “Software Tools, Techniques and Architectures for Computer Simulation”. May 2010; 86 (5-6)

Simulation: Transactions of the Society for Modeling and Simulation International. Special Issue: “Recent Advances in Unified Modeling and Simulation Approaches”. Double Issue: January, March 2010 (120 pages).

Mobile Networks and Applications. Guest Editor (with Olivier Dalle and John Heath): “Development Tools and Techniques for Mobile Telecommunications". Springer-Verlag December 2010.

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS). Berlin, Germany. 2019

Member of the IPC of the 12th International Conference of MOdeling, Optimization and SIMulation (MOSIM), Toulouse, France. 2018

Member of the IPC of the ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS). Rome, Italy. 2018

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS). Bordeaux, France. 2018

Member of the IPC of DS-RT. Madrid, Spain 2018

Member of the IPC of CoMetS (workshop of WETICE). Paris, France. 2018

Member of the IPC of the ASIM Symposium Simulation Technique Conference. Hamburg, Germany. 2018

Member of the IPC of the ACRI 2018 (Cellular Automata for Research and Industry). Lake Como, Italy. 2018

Member of the IPC of the International Joint Conference - CIO-ICIEOM-IISE-AIM, Girona, Spain. 2018

Program Committee Chair. Winter Simulation Conference. Las Vegas, NV. 2017

Member of the IPC of the ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS). Singapore.

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS’17). Seattle, WA.

Chair of the Steering Committee, Symposium on Theory of Modeling and Simulation (TMS’17), Virginia Beach, VA.

Member of the Steering Committee of SimuTools 2017. Shenzhen, PR of China.

* Track Co-Chair. Modelling Methodologies. Wintersim 2016. Arlington, VA. 2016

Chair of the Steering Committee, SummerSim 2016. Montreal, PQ, Canada.

Chair of the Steering Committee, Symposium on Theory of Modeling and Simulation (TMS’16), Pasadena, CA. 2016

Member of the IPC of the Modeling and Simulation of Complexity in Intelligent, Adaptive and Autonomous Systems. Pasadena, CA.2016.

Member of the IPC of the ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS). Banff, AB. 2016.

Member of the IPC of Journées DEVS francophones : Théorie et Applications / Workshop. Cargese, France. 2016.

Member of the IPC of COMETS (WETICE workshop). Paris, France. 2016.

Member of the IPC of DS-RT 2016. London, UK. 2016.

Chair of the Steering Committee, Symposium on Theory of Modeling and Simulation (TMS’15), Alexandria, VA. 2015

Member of the Steering Committee of SimuTools 2015. Athens, Greece. 2015

Chair of the Steering Committee, Symposium on Theory of Modeling and Simulation (TMS/DEVS’14), Tampa, FL. 2014

Member of the Advisory Board, Symposium on Simulation for Architecture and Urban Design. (SimAUD’14). 2014 Tampa, FL.

Member of the Steering Committee of SimuTools 2014, Coimbra, Portugal. 2014

Program Chair of the new ACM SIGSIM/PADS 2013 Conference.

General Chair of the Symposium on Theory of Modeling and Simulation (TMS/DEVS'13) (San Diego, CA, USA).

General Chair of the Symposium on Theory of Modeling and Simulation (TMS/DEVS'12) (Orlando, FL, USA).

Member of the Steering Committee of the International Conference on Simulation Tools and Techniques for Communications, Networks and Systems, SimuTools 2012 (Desenzano, Italy).

Track Co-Chair. Modelling Methodologies. Wintersim 2012. Berlin, Germany.

Workshop Chair. Modeling and Simulation in Cloud and Grid computing. CCGRID’12. Ottawa, ON.

General Chair of the Symposium on Theory of Modeling and Simulation (TMS/DEVS'11) (Boston, MA, USA).

Member of the Steering Committee of the International Conference on Simulation Tools and Techniques for Communications, Networks and Systems, SimuTools 2011 (Barcelona, Spain).

Member of the Advisory Board, 25th European Conference on Modeling and Simulation. Krakow, Poland. 2011

Member of the Advisory Board, The 3rd International Workshop on IT Service & Cloud Computing (ISCC 2011). Crete, Greece.

General Co-Chair of the Symposium on Theory of Modeling and Simulation (DEVS'10) (Orlando, FL, USA).

General Chair of the Summer Computer Simulation Conference 2010.

Member of the Steering Committee of theInternational Conference on Simulation Tools and Techniques for Communications, Networks and Systems, SimuTools 2010 (Torremolinos, Spain).

Member of the International Advisory Board of the 2nd International Conference on Computer Science and its Applications. Jeju, Korea. 2010.

General Chair of the Symposium on Theory of Modeling and Simulation (DEVS'10) (Orlando, FL, USA).

General Chair of the Spring Computer Simulation Conference 2009 (San Diego, CA).

General Co-Chair of the International Conference on Simulation Tools and Techniques for Communications, Networks and Systems, SimuTools 2009 (Rome, Italy). 2009.

Vice-General Chair of the Spring Computer Simulation Conference 2008 (Ottawa, ON, Canada).

Program Co-Chair of the First International Conference on Simulation Tools and Techniques for Communications, Networks and Systems, SimuTools 2008 (Marseille, France). 2008.

General Chair of the Summer Computer Simulation Conference 2007, San Diego, CA, 2007.

Member of the IPC of the Modeling and Simulation of Complexity in Intelligent, Adaptive and Autonomous Systems. Pasadena, CA. 2016

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS'15). Chicago, IL. 2015

Member of the IPC of the 7th International Conference on Discrete Models of Complex Systems. Toronto, ON. 2015

Member of the IPC of DS-RT 2015. Chengdu, China. 2015

Member of the IPC of the ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS). London, UK. 2015

Member of the IPC of the Winter Simulation Conference 2015. Huntington Beach, CA. 2015

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS'14). Monterey, CA. 2014

Member of the IPC of CoMetS 2014 (workshop of WETICE 2014). Parma, Italy. 2014

Member of the IPC of the IEEE International Symposium on INnovations in Intelligent SysTems and Applications, Alberobello, Italy. 2014

Member of the IPC of 7th Spatial Computing Workshop. AAMAS. 2014

Member of the IPC of the Winter Simulation Conference 2014. Savannah, GA. 2014

Member of the IPC of DS-RT 2014. Toulouse, France. 2014

Member of the IPC of the 2nd ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS). Denver, CO. 2014

Member of the IPC of the 10th International Conference of MOdeling, Optimization and SIMulation (MOSIM), Nancy, France. 2014

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS'13). Toronto, ON. 2013

Member of the IPC of the Winter Simulation Conference 2013 (Methodologies Track). Washington, DC. 2013

Member of the IPC of the ValueTools 2012. Cargese, France. 2012

Member of the IPC Summer Computer Simulation Conference. Genoa, Italy. 2012

Member of the IPC of CoMetS 2012 (workshop of WETICE 2012). Toulouse, France. 2012

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS'12). 2012

Member of the IPC of the International Conference on Computer, Information and Telecommunication Systems, Amman, Jordan. 2012.

9th International Conference of MOdeling, Optimization and SIMulation (MOSIM 2012), Bordeaux, France. 2012.

Member of the IPC of 2nd Symposium on Simulation for Architecture and Urban Design. Boston, MA. 2011.

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS'11).

Member of the IPC of the ValueTools 2011. Barcelona, Spain.

Member of the IPC of Agent-Directed Simulation 2011, Boston, MA.

Member of the IPC of Workshop on Simulations and Intelligent Mobility, St. Petersburg, Russia. 2011.

Track Organizer. Summer Computer Simulation Conference. The Hague, Netherlands.

Member of the IPC of CoMetS 2011 (workshop of WETICE 2011). Paris, France.

Member of the IPC of 2nd Symposium on Simulation for Architecture and Urban Design. Boston, MA. 2011

Member of the IPC of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS'11).

Member of the IPC of CoMetS 2011 (workshop of WETICE 2011). Paris, France.