Associate editor of VLSI Design Journal, Sustainable Computing: Informatics and Systems. Past Associate editor of IEEE Computer Architecture Letters, IEEE Transactions on VLSI and IEEE Transactions on Computers. Co-Guest Editor of Special Issues of the IEEE Trans. on Computers on Computer Arithmetic, July 2000, and on Fault Diagnosis and Tolerance in Cryptography, June 2006; and of a Special Issue of the Sustainable Computing: Informatics and Systems Journal. Keynote address at the 25th IEEE Symp. on Defect and Fault Tolerance in VLSI & Nanotechnology Systems, Oct. 2012. Steering Committee member - IEEE Symposium on Computer Arithmetic, IEEE Symposium on Defect and Fault Tolerance in VLSI & Nanotechnology Systems, and IEEE Green Computing Conference. General Chair - The 17th IEEE Symposium on Computer Arithmetic, June 2005. Co-general chair - FDTC 2005-2013, Fault Diagnosis and Tolerance in Cryptography. Program Committee co-chair - IGCC 2011 - International Green Computing Conference. Program Committee member - The 43rd IEEE/IFIP Conference on Dependable Systems and Networks (DSN),} June 2013; The 2003-2013, 16th-21th IEEE Symposiums on Computer Arithmetic; The 2013 ACM Reliable and Convergent Systems Conference; The 2012 ACM Research in Applied Computation Symposium, October 2012; 9th ACS/IEEE Conference on Computer Systems and Applications, 2011, 12th IEEE Conference on High Performance Computing and Communications, 2010, 11 - 16 Euromicro Conference on Digital System Design, 2008-2013. Member of NSF Computer Engineering Research Proposal Review Panels, 2002, 2003, 2004 and 2009. Program Committee member - The 2004-2013 IEEE Symposium on Defect and Fault Tolerance in VLSI Systems. Program Committee member - The 2004-2010 IEEE Symposium on Application-specific Systems.