After the graduation of Seoul National University, Seoul Korea, he joined LG Information & Communication., Ltd in 1987. He worked for the development of Electronic Switching System during 1987-1988. Then he pursued his Ph.D at University of Southern California USA. After Ph.D, he rejoined LG Electronics where now became vice president and the head of mobile communication technology research center.

His research interests are mobile and cellular networks, IP QOS, IMT-2000 and beyond, All IP mobile networks, mobile Internet, 4G and others. One of his major achievements was UMTS Access system development in 2001. In addition, he has been actively participated in IMT-2000 & 4G global standardization activity ever since 3GPP global standard body was established. He regularly attends 3GPP and 3GPP2 global mobile standard meetings as a head representative of LG Electronics. He is also a member of TTA, the official standard development organization in Korea. He chaired IMT-2000 & 4G Project Group in TTA from 2002 till 2007. He is also a board member of OMA, Open Mobile Alliance and an associate member of NGMN, Next Generation Mobile Network where he actively participates into various working groups.