• Webmaster and TPC member, ISIT 1995 (Whistler, BC, Canada)
• General co-chair, 5th CWIT, 1997 (Toronto, ON, Canada)
• Associate Editor for Coding Theory, IEEE Transactions on Information Theory, 1997-2000
• Publicity Chair, ISIT 1998 (MIT, Cambridge, MA, USA)
• Guest co-editor, IEEE Transactions on Information Theory, special issue on Codes on Graphs and Iterative Algorithms, Feb. 2001
• TPC co-chair, ISIT 2004 (Chicago, IL, USA)
• Board of Governors, IEEE Information Theory Society (2007-)
• General co-chair, ISIT 2008 (Toronto, ON, Canada)
• Second vice-president, IEEE Information Theory Society, 2008
• First vice-president, IEEE Information Theory Society, 2009
• President, IEEE Information Theory Society, 2010

TPC=Technical Program Committee
ISIT=IEEE International Symposium on Information Theory
CWIT=Canadian Workshop on Information Theory