Gyu-Dong Sung is a businessperson who has been at the helm of 10 different companies. Presently, he occupies the position of Co-Chief Executive Officer & Director at EO Technics Co., Ltd., Chief Executive Officer for Eo Technics Singapore Pte., Ltd., Chief Executive Officer at Eo Technics India Pvt., Ltd. and Chief Executive Officer at EO Technics Suzhou Co., Ltd. (which are all subsidiaries of EO Technics Co., Ltd.), Chief Executive Officer for EO Technics International, Inc., Chief Executive Officer at EO Technics Tianjin Ltd., Chief Executive Officer of Laser Via Tech Co., Ltd., Chief Executive Officer at Laser Via Tech, Chief Executive Officer for Laser International Ltd. and Chief Executive Officer for Laser Via Tech. Gyu-Dong Sung is also on the board of 5 other companies.

He received a graduate degree from Seoul National University.