• Review Board for VLDB 2018, 2016, 2014 (International Conference on Very Large Databases)
• General Chair for PODC 2009, ACM Symposium on Principles of Distributed Computing
• Member of Steering Committee for PODC, ACM Symposium on Principles of Distributed Computing (2007-2010)
• Treasurer for PODC 2008 ACM Symposium on Principles of Distributed Computing
• Workshops chair for PODC 2007, ACM Conference on Principles of Distributed Computing.
• Publications chair for ICDCN 2006, Eighth International Conference on Distributed Computing and Networking
• Editor, ISRN Journal for Computational Mathematics
• Program Committee Member for the following conferences:
  • ICDE 2019: IEEE International Conference on Data Engineering
  • The Web Conference 2019 (formerly WWW), Social Network Analysis and Graph Algorithms Track
  • ICDE 2019: IEEE International Conference on Data Engineering
  • PPoPP 2019: Principles and Practice of Parallel Programming – Extended Review Committee
  • CIKM 2018: ACM International Conference on Information and Knowledge Management
  • PODS 2018: ACM Symposium on Principles of Database Systems
  • High Performance Graph Data Management and Processing workshop (HPGDMP) 2016
  • HiPC 2016, International Conference on High Performance Computing
  • ICDT 2017, International Conference on Database Theory
  • ICPP 2016, International Conference on Parallel Processing
  • CIKM 2015: ACM International Conference on Information and Knowledge Management
  • IPDPS 2015: 29th IEEE International Parallel and Distributed Processing Symposium
  • SOFSEM 2015: International Conference on Current Trends in Theory and Practice of Computer Science
  • CIKM 2014: ACM International Conference on Information and Knowledge Management
  • BDA 2014: Third International Conference on Big Data Analytics
  • PAKDD 2014, Pacific-Asia Conference on Knowledge Discovery and Data Mining
  • Second International Conference on Big Data Analytics (BDA 2013), Mysore, India, 2012
  • ICPP 2013, International Conference on Parallel Processing
  • IWQoS 2013, ACM/IEEE International Workshop on Quality of Service
  • ICPP 2012, International Conference on Parallel Processing
  • PAKDD 2012, Pacific-Asia Conference on Knowledge Discovery and Data Mining
  • ASPIRE 2011, First International Conference on Software Systems, Mysore, India.
  • ADMA 2011, 7th International Conference on Advanced Data Mining and Applications
  • IWQoS 2011, ACM/IEEE International Workshop on Quality of Service, June 2011
  • DCOSS 2011, IEEE International Conference on Distributed Computing in Sensor Systems
  • PAKDD 2011, The 15th Pacific-Asia Conference on Knowledge Discovery and Data Mining
  • ICDCN 2011, 12th International Conference on Distributed Computing and Networking
  • IPDPS 2010, 24th IEEE International Parallel and Distributed Processing Symposium
  • SIROCCO 2009, 16th International Colloquium on Structural Information and Communication Complexity
  • PAKDD 2009, The 13th Pacific-Asia Conference on Knowledge Discovery and Data Mining
  • ICDCN 2009 International Conference on Distributed Computing and Networking
  • DCOSS 2008 International Conference on Distributed Computing in Sensor Systems
  • ICDCN 2008 International Conference on Distributed Computing and Networking
  • ACS/IEEE International Conf. on Computer Systems and Applications (AICCSA) 2008
  • ICPP 2007 International Conference on Parallel Processing.
  • DEPSA 2007 First International Workshop on Distributed Event Processing, Systems and Applications (DEPSA’ 07)
  • IPDPS 2007, International Parallel and Distributed Processing Symposium
  • ICDCN 2006, Eighth International Conference on Distributed Computing and Networking
  • HiPC 2006, International Conference on High Performance Computing
  • SSS 2006, International Symposium on Stabilization, Safety, and Security of Distributed Systems
  • OPODIS 2005, International Conference on Principles of Distributed Systems
  • SSS 2005 Workshop on Self-Stabilizing Systems
  • ACM MOBIHOC 2005 ACM Symposium on Mobile Ad Hoc Networking and Computing
  • WSN 2005 IEEE Wireless Com, Symposium on Wireless Sensor Networks
  • International Conference on Applied Computing (AC) 2004
• Referee for the following journals:
  • IEEE Transactions on Knowledge and Data Engineering
  • ACM Transactions on Algorithms
  • Algorithmica
  • ACM Transactions on Knowledge Discovery in Data
  • Distributed Computing
  • IEEE/ACM Transactions on Networking
  • Journal of Computer and System Sciences
  • ACM Transactions on Computer Systems
  • Journal of the ACM
  • SIAM Journal on Discrete Mathematics and Applications
  • Journal of Aerospace Computing, Information, and Communication
  • Theoretical Computer Science
  • Theory of Computing Systems