기타
Mar. 2014 ~ Current, Vice Chair of TTA STC1 (Special Technical Comittee 1 on IoT (Internet of Things))
Jan. 2010 - Current, Editorial Board Member of Pertanika Journal of Science & Technology
Jan. 2013 - Dec 2013, Chair of Communication Networks Technical Committee of KICS (The Korean Insititue of Communications and Information Sciences)
Nov. 2009 ? 2013, Standardization Working Group Co-Chair (together with Dr. Hyung-Jun Kim of ETRI) of 사물지능통신포럼 M2M / IoT Forum (Machine to Machine and Internet of Things Forum), Korea under KCC (Korea Communications Commission)
Dec. 2009 ? 2011, Korea Mirror Committee Member of ISO/IEC JTC1 WG 7 Sensor Networks
Jan. 2007 ? Dec. 2009, Technology and Standardization Working Group Chair of IP-USN (IP-based Ubiquitous Sensor Networks) Forum, Korea under Ministry of Information and Communication, Korea
Mar. 1997 ? Feb. 2005, Associate Professor, Dept. of Computer Engineering, Yeungnam University, Korea.
Dec. 2000 ? Aug. 2001, Senior Software Engineer, AdForce, Inc., Cupertino, CA, US