• Editorial Board Member: Cluster Computing and International Journal of Computational Science and Engineering.
  • Executive Board of the IEEE-Computer Society Technical Committee on Parallel Processing (2003-2006) - member.
  • Guest Editor of: Cluster Computing and International Journal of Computational Science and Engineering (2005).
  • General Chair of the High Performance Computing Symposium 2003 (HPC2003) - Orlando, Florida.
  • Co-founder of the Workshop on Challenges of Large Applications in Distributed Environments (CLADE), in conjunction with the IEEE High Performance Distributed Computing.
  • Program Chair of the IEEE - High Performance Distributed Computing 2003 Symposium - Workshop on Challenges of Large Applications in Distributed Environments (CLADE) 2003, Seattle.
  • Co-Chair of the "Adaptivity in Parallel Scientific Computing" - Dagstuhl Seminar 03211(part of the High-Level Scientific Conferences at Schloss Dagstuhl sponsored by DAAD) - Germany, May 18-23, 2003.
  • Member on a few NSF Review Panels for CISE-ACR, and International programs.
  • Stanford University: Integrating Research into the Teaching Environment Program, 2001 - program reviewer.
  • Steering Committee member (2003 - present) of: IEEE-HPDC Symposium - CLADE workshop ('03-06), High Performance Computing Symposium (HPC'03-06)
  • Program Committee (also track chair and session chair) of:
          .IEEE International Parallel and Distributed Processing Symposium (IPDPS) - Heterogeneous Computing Workshop (HCW'02).
          .IEEE International Parallel and Distributed Processing Symposium (IPDPS) - Workshop on Parallel and Distributed Scientific and Engineering Computing with Applications (PDSECA'02-'06).
          .International Conference on Parallel and Distributed Computing Systems (PDCS'98,'03-'05).
          .International Conference on Parallel Computing Technologies (PACT2003-SHPSEC Workshop).
          .International Conference on Pervasive Services (ICPS'05).
          .IEEE International Conference on Cluster Computing (CLUSTER) - Workshop on Algorithms, Models, and Tools for Parallel Computing on Heterogeneous Networks (HeteroPar '03-'05).
          .High Performance Computing Symposium (HPC '99-'02).
          .Annual Simulation Symposium (ANS'06).
          .International Conference for Parallel Processing and Applied Mathematics (PPAM '05) - Workshop on Large Scale Computations on Grids (LaSCoG'05), and others.
  • Senior IEEE Member and Member of ACM, SIGACT, SIGARCH, SIAM (Supercomputing), AMS, ASEE,
  • Upsilon Pi Epsilon (Computer Science Honor Society) and Phi Kappa Phi (Academic Honor Society).

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