1. Program committee member: the 2022 Web Conference (TheWebConf 2022, formerly known as WWW conference).
  2. Reviewer for IEEE Transactions on Services Computing (September 2021).
  3. Reviewer for IEEE Transactions on Dependable and Secure Computing (August 2021).
  4. Program committee member: the 23rd International Conference on Information and Communications Security (ICICS 2021).
  5. Reviewer for ACM Transactions on Internet Technology (April 2021).
  6. Track chair, the 41st IEEE International Conference on Distributed Computing Systems (ICDCS 2021), Security, Privacy, and Trust in Distributed Systems track.
  7. Program committee member: the 2021 Web Conference (TheWebConf 2021, formerly known as WWW conference).
  8. Program committee Vice-Chair, 2020 International Conference on Edge Computing (EDGE 2020), virtual conference, September 18 - 20, 2020.
  9. Program committee Co-Chair, Workshop on Data Analytics and User Behavior (DARB 2020), co-located with IEEE IRI 2020, online, August 10-13, 2020.
  10. Reviewer for IEEE Transactions on Dependable and Secure Computing (August 2020).
  11. Program committee member: the 2020 Web Conference (TheWebConf 2020, formerly known as WWW conference).
  12. Program committee member: the 2nd Workshop on Fog Computing and the Internet of Things (Fog-IoT 2020).
  13. Reviewer for ACM Transactions on Internet Technology (June 2020).
  14. Reviewer for Computers & Security (April 2020).
  15. Program committee member: the 2019 Web Conference (TheWebConf 2019, formerly known as WWW conference).
  16. Program committee member: the 19th International Symposium on High Assurance Systems Engineering (HASE 2019).
  17. Program committee member: the first Workshop on Fog Computing and the Internet of Things (Fog-IoT 2019).
  18. Program committee member: the 6th Annual Hot Topics in the Science of Security Symposium (HotSoS 2019).
  19. Reviewer for ACM Transactions on Internet Technology (November 2019).
  20. Reviewer for Future Generation Computer Systems (September 2019).
  21. Reviewer for Computers & Security (July 2019).
  22. Reviewer for Journal of Intelligent Information Systems (March 2019).
  23. Program committee member: the 25th International Conference on Web Services (ICWS 2018).
  24. Reviewer for IEEE Security and Privacy magazine (April 2018).
  25. Program committee member: the Third IEEE International Conference on Collaboration and Internet Computing (IEEE CIC 2017).
  26. Program committee member: the 35th IEEE International Performance Computing and Communications Conference (IPCCC 2016).
  27. Program committee member: the 2nd IEEE International Conference on Collaboration and Internet Computing (IEEE CIC 2016).
  28. Program committee member: the 17th IEEE International Symposium on High Assurance Systems Engineering (HASE 2016).
  29. Program committee member: the 11th International Conference on Availability, Reliability and Security (AReS 2016).
  30. Program committee member: the 9th IEEE International Conference on Cloud Computing (IEEE CLOUD 2016).
  31. Reviewer for IEEE Transactions on Information Forensics and Security (March 2016).
  32. Program committee member: the 1st IEEE International Conference on Collaboration and Internet Computing (IEEE CIC 2015).
  33. Reviewer for ACM Computing Surveys (May 2015).
  34. Reviewer for IEEE International Conference on Software Quality, Reliability and Security (QRS 2015).
  35. Program committee member: the 34th IEEE International Performance Computing and Communications Conference (IPCCC 2015).
  36. Program committee member: the 8th IEEE International Conference on Cloud Computing (IEEE CLOUD 2015).
  37. Reviewer for IEEE Transactions on Dependable and Secure Computing (March 2015).
  38. Program committee member: the 10th International Conference on Availability, Reliability and Security (AReS 2015).
  39. Program committee member: the 16th IEEE International Symposium on High Assurance Systems Engineering (HASE 2015).
  40. Program committee member: the 33rd IEEE International Performance Computing and Communications Conference (IPCCC 2014).
  41. Reviewer for Software Quality Journal, Special Issue on High Assurance, Springer, 2014.
  42. Program committee member: the 10th International Conference on Security and Privacy in Communication Networks (SecureComm 2014).
  43. Reviewer for the Special Issue of EAI Transactions on Collaborative Computing (2014).
  44. Program committee member and Workshop Co-Chair: the 10th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2014).
  45. Program committee member: the 9th International Conference on Availability, Reliability and Security (AReS 2014).
  46. Program committee member: the 2nd Cloud and Autonomic Computing Conference (CAC 2014).
  47. Organizing and program committee member: the 15th IEEE International Symposium on High Assurance Systems Engineering (HASE 2014).
  48. Program committee member: the 8th International Conference on Availability, Reliability and Security (AReS 2013).
  49. Program committee member and Publication Chair: the 9th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2013).
  50. Reviewer for IEEE Transactions on Information Forensics and Security (April 2013).
  51. Reviewer for IEEE Transactions on Parallel and Distributed Systems (December 2012).
  52. Reviewer for IEEE Computer (2012).
  53. Reviewer for the 8th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2012).
  54. Publicity Chair: the 8th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2012).
  55. Reviewer for the 6th ACM International Conference on Distributed Event-Based Systems (DEBS’12).
  56. Reviewer for ACM/Kluwer Journal of Wireless Networks (July 2011).
  57. Reviewer for Elsevier Journal of Computers and Security (March 2011, April 2012, July 2012, October 2012, March 2013, May 2013, October 2014, April 2015).
  58. Reviewer for the IEEE Network magazine (February 2011).
  59. Program committee member: the 31st International Conference on Distributed Computing Systems (ICDCS 2011).
  60. Proceedings Chair, the 18th IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunications Systems (MASCOTS 2010).
  61. Program committee member: the 8th IEEE International Conference on Web Services (ICWS 2010).
  62. Local Arrangement Chair, IEEE SERVICES 2010 (ICWS, SCC, CLOUD).
  63. Reviewer for ACM Transactions on Computer Systems (TOCS), 2009.
  64. Reviewer for IEEE Transactions on Services Computing (2009, 2012).
  65. Program committee member: the 2009 IEEE Conference on Service Oriented Computing and Applications (SOCA'09).
  66. Program committee member: the fourth International Conference on Risks and Security of Internet and Systems (IEEE CRiSIS 2009).
  67. Publication Chair: the Second International Workshop on Event Drive Architecture and Event Processing Systems (EDA-PS 2007).
  68. External reviewer for conferences: Middleware (2005), International Conference on Generative Programming and Component Engineering (2006), DSN (2007), ICWS (2007), 5th International Conference on Business Process Management (2007), FAST (2009), ACM Symposium on Applied Computing (2009), ICWS (2009).
  69. External reviewer for IEEE Communications Magazine.