- (Scientific Committee) 4th International Workshop on Stochastic Processes and Their Applications. Zaragoza, Spain.
- (Program Committee) EPEW 2024, The 20th European Performance Engineering Workshop. Venice, Italy.
- (Co-chairman) Semestre Temático «Procesos de Markov y sus aplicaciones». Red temática Procesos Estocásticos y sus Aplicaciones; actuación RED2022-134435-T financiada por MCIN/AEI/10.13039/501100011033 . Universidad Complutense de Madrid, Spain.
- (Co-chairman) 2nd International Workshop on Stochastic Processes and their Applications. A virtual workshop, Spain.
- (Program Committee) ASMTA 2021, 26th International Conference on Analytical and Stochastic Modelling Techniques and Applications. A online event.
- (Co-chairman) 1st International Workshop on Stochastic Processes and their Applications. A virtual workshop, Spain.
- (Organizing Committee) Diderot Mathematical Forum 2016, Biomedical Applications of Mathematics, European Mathematical Society, Milano-Paris-Madrid.
- (Co-chairman) 10th International Workshop on Retrial Queues. Tokyo, Japan.
- (Co-chairman) A Two-day Meeting on Mathematical Biology – ICMAT. Madrid, Spain.
- (International Program Committee) Modern Probabilistic Methods for Analysis, Design and Optimization of Information Telecommunication Networks — Twentieth Second Belarusian Winter Workshop in Queueing Theory, BWWQT 2013. Minsk, Belarus.
- (Program Committee) ICORES 2012 – 1st International Conference on Operations Research and Enterprise Systems. Vilamoura, Portugal.
- (Program Committee) 9th International Workshop on Retrial Queues. Seville, Spain.
- (Technical Program Committee) 7th International Multi-Conference on Computing in the Global Information Technology. Venice, Italy.
- (Organizing Committee) Third Madrid Conference on Queueing Theory. Toledo, Spain.
- (International Program Committee) Mathematical Methods for Analysis and Optimization of Information and Telecommunication Networks — Twentieth Belarusian Winter Workshop in Queueing Theory, BWWQT 2009. Minsk, Belarus.
- (International Program Committee) International Conference on Computers & Industrial Engineering, CIE39. Troyes, France, 2009.
- (Program Committee) IEEM 2009 – IEEE International Conference on Industrial Engineering and Engineering Management. Hong Kong, China.
- (Scientific Program Committee) Seventh International Workshop on Retrial Queues. Athens, Greece.
- (International Program Committee) International Conference «Mathematical Methods for Increasing Efficiency of Info-Telecommunication Networks» – Nineteenth Belarussian Winter Workshop in Queueing Theory. Grodno, Belarus.
- (International Advisory Committee) International Conference on Simulation and Modeling. Coimbatore, India.
- (Programme Committee) IASTED International Conference on Applied Simulation and Modelling, ASM 2007. Palma de Mallorca, Spain.
- (Organizing Committee) Second Madrid Conference on Queueing Theory. Madrid, Spain.
- (Chairman) Sixth International Workshop on Retrial Queues. Miraflores de la Sierra, Madrid, Spain.
- (Programme Committee) IASTED International Conference on Applied Simulation and Modelling, ASM 2006. Rhodes, Greece.
- (Programme Committee) IASTED International Conference on Applied Simulation and Modelling, ASM 2005. Benalmádena, Spain.
- (Programme Committee and Invited talk) 5th International Workshop on Retrial Queues. Korea University, Seoul, Korea.
- (Organizing Committee) First Madrid Conference on Queueing Theory. Madrid, Spain.
- (Secretary of the Organizing Committee) 1st International Workshop on Retrial Queues. Madrid, Spain.