• Editor-in-Chief, International Journal of Communication Systems, Wiley, October 1997-Present.

• Editor-in-Chief, Journal of Convergence: The International Journal of the Future Technology Research Association International, FTRA.

• Editor-in-Chief, Journal of Information Processing, KSIP.

 • Editor, IEEE Wireless Communications, 2005-2010.  

• Editor, Journal of Communications, The Academy Publisher, 2006-Present.  

• Editor, Journal of Networks, The Academy Publisher, 2008-Present. 

•Associate Editor, IEEE Systems Journal, 2009-Present. 

• Associate Editor, IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics; 1992-Present. 

• Associate Editor, IEEE Transactions on Systems, Man, and Cybernetics, Part Applications and Reviews, 1992-2004.

• Editorial Board Member, Journal of Supercomputing, Springer, 2000-Present.  

• Associate Editor, Journal for Defense Modeling and Simulation: Applications, Methodology, Technology, SCS, 2003-Present.

•Advisory Editorial Board Member, Security and Communication Networks Journal, 2007-Present, Wiley (Founding Member).  

•Member of the Editorial Advisory Board, Simulation: Transactions of the Society for Modeling and Simulation International, SCS, 2005-Presnet.

•Advisory Editorial Board Member, International Journal of Information Technology, Communications and Convergence, IJITCC, Journal, Inderscience, 2009-Present (Founding Member).  

International Advisory Board Member, International Journal of Wireless Networks and Broadband Technologies, 2009-Present. 

Member of the Editorial Advisory Board, International Journal of BioSciences and Technology, 2008-Presnet. 

• Associate Editor, IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans; 1992-2008. 

• Member of the Editorial Board, Journal of Computer Science and Engineering in Arabic, Philips Publishing, NJ, USA; 2007-Present. 

• Area Editor for the Telecommunications and Networking Area, Simulation: Transactions of the Society for Modeling and Simulation International, Sage and SCS (2001-2005).   

• Associate Editor, The Society for Computer Simulation monthly Journal "SIMULATION", 1991-2001. 

• Associate Editor, Journal of Computers and Electrical Engineering, Elsevier, 1991-Present.  

• Editorial Board Member, International Journal of Communication Networks and Distributed Systems, IJCNDS,  2006-Present. 

• Editorial Advisory Board Member, Computer Communications Journal, Elsevier, 2000-Present.  

• Editorial Advisory Board Member, International Journal of Information Technology, Communications and Convergence (IJITCC), Inderscience, 2009-Present.  

• Member of the Editorial Review Board, IEEE Transactions on Instrumentation and Measurement, 1992-1999. 

• Member of the Editorial Board, ACM Applied Computing Review, 1992-1999.  

• Member of the Editorial Board, International Arab Journal on Information Technology, 2001-Pressent.  

• Member of the Editorial Board of the International Journal of Information Sciences and Computer Engineering (IJISCE), 2009-Present. 

• Guest Editor, Special Issue on High Performance Computing/Computers, The Society for Computer Simulation monthly journal SIMULATION, Vol. 61, No. 3, September 1993. 

• Guest Editor, Special Issue on High Speed Networking, The Society for Computer Simulation monthly Journal, SIMULATION, Vol. 64, No.1, January 1995. 

• Guest Editor, Special Issue on Modeling and Simulation of Computer Systems and Networks, Part I: Networks, The Society for Computer Simulation monthly Journal, SIMULATION, Vol. 68, No. 1, January 1997. 

• Guest Editor, Special Issue on Modeling and Simulation of Computer Systems and Networks, Part II: Computer Systems, The Society for Computer Simulation monthly Journal, SIMULATION, Vol. 68, No. 4, April 1997. 

•Guest Editor, Special Issue on Performance Evaluation Issues and Applications in Telecommunications Systems, Computer Communications Journal, Elsevier, March 2001. 

• Editor, Proceedings of the 1997 SCS Summer Computer Simulation Conference, 957 Pages, SCS, 1997. 

• Editor, Proceedings of the 1998 SCS Summer Computer Simulation Conference, 696 Pages, SCS, 1998. 

• Editor, Proceedings of the 1998 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'98, 352 Pages, SCS, 1998.  

• Guest Editor, IEEE Transactions on Systems, Man and Cybernetics, Part: B, on the Applications of Neural Networks to Systems, Man and Cybernetics, Vol. 28, N0. 4, August 1998. 

• Guest Editor, Special Issue of the International Journal of Communication Systems on Performance Evaluation of ATM Systems, Wiley, July/August 1998. 

• Guest Editor, Simulation Journal, Special Issue on the Performance Evaluation of Computer Systems and Networks, The Society for Computer Simulation, May 1998. 

• Guest Editor, Journal of Computers & Electrical Engineering, Elsevier, Special Issue on Performance Evaluation of High Performance Computer Systems, Elsevier, May 1999. 

• Editor, Proceedings of the 1999 SCS Summer Computer Simulation Conference, 656 Pages, SCS, 1999. 

• Editor, Proceedings of the 1999 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'99, 414 Pages, SCS, 1999.  

• Editor, Proceedings of the 2000 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'00, 570 Pages, SCS, 2000.  

• Editor, Proceedings of the 2001 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'01, 634, Pages, SCS, 2001. (With Franco Davoli as Co-Editor). 

• Guest Editor, Special Issue of the Computer Communications Journal on the Performance Evaluation of Telecommunication Systems: Models, Issues and Applications, Elsevier, May 2001. 

• Guest Editor (with G. I. Papadimitriou and A. S. Pomportsis), Special Issue of the International Journal of Communication Systems on Advances in Optical Network: Architectures, Performance and Protocols, Wiley, December 2001.   

• Guest Editor, Special Issue of the Transactions of the Society for Computer Simulation on the Performance Modeling and Simulation of ATM Systems and Networks, Part I, Vol. 78, No. 3, March 2002.  

• Guest Editor, Special Issue of the Transactions of the Society for Computer Simulation on the Performance Modeling and Simulation of ATM Systems and Networks, Part II, Vol. 78, No. 4, April 2002.  

 

•Guest Editor (with G. I. Papadimitriou and A. S. Pomportsis), IEEE Transactions on Systems, Man and Cybernetics, Part: B, on Learning Automata: Theory, Paradigms and Applications, Vol. 32, No. 6, December 2002.  

 

•Guest Editor, Special Issue of Computer Communication Journal on Advances in  Performance Evaluation of Computer and

Telecommunications Networking, Vol. 25, Issues 11-12, July 2002. 

Editor, Proceedings of the 2002 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'02, 989 Pages, SCS, 2002. (With Franco Davoli, Ibrahim Onyuksel and Raffaelle Bolla as Co-Editors). 

•Guest Editor, Special Issue of Computer Communication Journal on Recent Advances in Communications Networking, Vol. 26, No. 15, September 2003.  

•Co-Guest Editor, Special Issue of Performance Evaluation Journal on Performance Modeling and Evaluation of High-Performance Parallel and Distributed Systems, Elsevier, 2004.  

Editor, Proceedings of the 2003 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'03, 989 Pages, SCS, 2003. (With Franco Davoli, Erina Ferro, and Ibrahim Onyuksel as Co-Editors). 

•Guest Editor, Special Issue of Computer Communication Journal on Recent Advances in Computer Communications, September 2004.  

• Editor, Proceedings of the 2004 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'04, 959 Pages, SCS, 2004. (With Abbas Jamalipour, and Franco Davoli as Co-Editors). 

• Editor, Proceedings of the 2005 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'05, 962 Pages, SCS, 2005. (With Mario Marches, and Franco Davoli as Co-Editors). 

• Guest Editor, Special Issue Computer Communication Journal on Performance Evaluation of Wireless Networks and Communications, Elsevier, Vol. 29, No. 8, May 2006. 

• Guest Editor, Special Issue Simulation: Transactions of the Society for Modeling and Simulation International on Performance Evaluation of Wireless Systems, SCS, 2005. 

• Guest Editor, Special Issue of Computers & EE Journal on Recent Advances in Wireless Networks and Systems, Elsevier, Vol. 32, Nos. 1-3, January –May 2006.   

• Guest Editor, Special Issue Computer Communication Journal on Advances in Computer Communication Networks, 2006.  

• Editor, Proceedings of the 2006 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'06, 630 Pages, SCS, 2006. (With Franco Davoli, Jose Marzo, and Ljiljana Trakovic as Co-Editors).  

• Editor, Proceedings of the 2006 International Conference on E-Business (ICE-B)-Part of IEEE ICETE 2006, 328 Pages, 2006. (With Joaquim Filipe and Thomas Greene). 

• Guest Editor, Special Issue Simulation: Transactions of the Society for Modeling and Simulation International on Recent Advances in Modeling and Simulation of Network Systems, SCS, Vol. 82, No. 6, June 2006.  

• Guest Editor, Special Issue Computer Communication Journal on Advances in Performance of Communication Networks,” July 2007.   

• Guest Editor, Special Issue of IEEE Systems Journal on “Recent Advances in Global Navigation and Communication Satellite Systems (GNCSS)” Vol. 2, No. 1, March 2008.   

Co-Editor, Proceedings of  the 2006 International Symposium on Ad hoc and Ubiquitous Computing (ISAHUC 2006),

Surathkal, Mangalore, India, Dec. 20-23. Published as a book by IEEE Press, 2007. 

 

 Editor, Proceedings of the 2007 International Conference on E-Business (ICE-B)-Part of IEEE ICETE 2007, 366 Pages, 2007.

(With Joaquim Filipe). 

 

Editor, Proceedings of the 2007 International Conference on Security and Cryptography, SCRYPT 2007, Part of IEEE ICETE

2007, 434, (With Joaquim Filipe). 

 

Editor, Proceedings of the 2007 International Conference on Wireless Information Networks and Systems, WINSYS 2007, Part

of IEEE ICETE 2007, 320 Pages, 2007. (With Joaquim Filipe).

 Editor, Proceedings of the 2007 International Conference on Signal Processing and Multimedia Applications, SIGMAP 2007, Part of IEEE ICETE 2007, 471Pages, 2007. (With Joaquim Filipe).

 Editor, Proceedings of the 2007 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'07, 620 Pages, SCS, 2007. (With Jose Marzo, and Ljiljana Trajkovic as Co-Editors).

Guest Editor, Special Issue Simulation: Transactions of the Society for Modeling and Simulation International on Advances in

Performance Evaluation of Computer and Telecommunication Systems, SCS, Vol. 83, No.2, February 2007.   

Guest Editor, Special Issue of IEEE Wireless Communications on "Medium Access Control Protocols for Wireless LANs", Dec 2008.  

Guest Editor, Special Issue of IEEE Systems Journal on: "Recent Advances in Global Navigation and Communication Satellite

 Systems (GNCSS)," Vol. 2, No. 1, March 2008.   

 

Guest Editor, Special Issue Computer Communication Journal on Performance Evaluation of Communication Networks,”

 Vol.31, No. 16, October 2008.   

 

Guest Editor, Special Issue Simulation: Transactions of the Society for Modeling and Simulation International on Modeling and

Simulation of Computer and Telecommunication Systems, SCS, 2008.   

 

 Guest Editor, Special Issue of the Wiley Security and Communications Networks Journal on "Security in Wireless Sensor

Networks," December 2008. 

 

Guest Editor, Special Issue of the International Journal of Communication Networks and Distributed Systems (IJCNDS) on the

Techniques and Protocols for Merging Wireless and Mobility Services 3rd Quarter 2009. 

 

Guest Editor, Special Issue Simulation: Transactions of the Society for Modeling and Simulation International on Advances in

Performance Evaluation of Computer and Telecommunication Systems, SCS, 2009. 

Guest Editor, Special Issue of the International Journal of Communication Networks and Distributed Systems (IJCNDS) on Performance Evaluation of Computer Networks and Parallel Systems, 3rd Quarter 2009.

Guest Editor, Special Issue of the IEEE Transactions on Systems, Man and Cybernetics (SMC)-Part B on International Journal

of Communication Networks and Distributed Systems (IJCNDS) on Adaptive and Learning Systems, 2009.

Editor, Proceedings of the 2008 Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'08, 650 Pages, SCS, 2008. (With Jose Marzo, and Helena Szczerbicka as Co-Editors).

Editor, Proceedings of the 2009 Symposium on Performance Evaluation of Computer and Telecommunication Systems,

SPECTS'07, 620 Pages, SCS, 2007. (With Jose Marzo, and Sevi Sevillano and Pawel Gburzynski as Co-Editors).  

Editor, Proceedings of the 2008 International Conference on Wireless Information Networks and Systems, WINSYS 2008, Part of IEEE ICETE 2008, 350 Pages, 20087. (With Rafael Caldeirinha). 

 Editor, Proceedings of the 2009 International Conference on Wireless Information Networks and Systems, WINSYS 2009,

Part of IEEE ICETE 2009, 2009, (With Rafael Caldeirinha).

 

Guest Editor, Special Issue of the Journal of Networks, (JNW) on Performance Evaluation of Computer Networks, 3rd Quarter

2009.

 

 Guest Editor, Special Issue Simulation: Transactions of the Society for Modeling and Simulation International on Advances in

 Performance Evaluation of Computer Systems and Networks, SCS, 2010. 

 

Guest Editor, Special Issue/Fast Track, Computer Communications Journal on Performance Evaluation of Computer and

 Communication Systems, Elsevier, 2010. 

 

Guest Editor, Special Issue of the Journal of Networks, (JNW) on Performance Evaluation of Communication Networking,

 2010.