Yong Seok Yoon is currently Executive Vice President and Board Member of KTH, an Internet Business Arm of Korea Telecom.  Yoon has held several positions such as R&D Director, Corporate Strategy Vice President at Korea Telecom as well as Member of Technical Staff at Bellcore in US.

Yoon holds a B.S. in Business Administration from Yonsei University, Korea, and M.B.A./Ph.D in Decision Science from State University of New York at Buffalo. Yoon has published numerous papers in Management Science, Operations Research, ORSA Journal on Computing, International Journal of Purchasing & Materials Management, IEEE Transactions on ****, Electronic Letters, etc.