• The ACM 19th Annual International Conference on Mobile Computing and Networking (MobiCom 2013)
  Sept 30-Oct 4, 2013, Miami, Florida (General Chair)

• The ACM 11th International Conference on Ubiquitous Computing (Ubicomp 2009)
  Sept 30 - Oct 3, 2009, Orlando, Florida, USA (General Chair).

• The 4th IET International Conference on Intelligent Environments (IE08)
  21 - 22 July, 2008, University of Washington, Seattle, USA (General Co-Chair)

• The 6th International Conference On Smart Homes and Health Telematics
  Quality of Life Enhancement for People with Special Needs in Rural Environments. June 28 - July 2, 2008, Iowa State University, Ames, Iowa, USA (Program Co-Chair)

• NSF PRE-ICADI Preparatory Workshop on Aging, DIsabilities and Independence
  june 26-28, 2003, the Royal Academy of Engineering, London, U.K. (Workshop Chair)

• NSF POST ICADI Assessment Workshop
  June 30, 2004, Tokyo, Japan. (Workshop Chair)

• ACM HotMobile 1999 - The International Workshop on Mobile Computing Systems and Applications (WMCSA, then)
  February 25-26, 1999, New Orleans, Louisiana, USA, (General Chair)

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Research Exchanges [2007-]

• University of Essex - University of Florida Research Exchange on Intelligent Environments
  April 20-22, 2007, At the University of Florida.

• University of Dundee - University of Florida Research Exchange
  July 27, 2009, At the University of Florida.