Chairman of KleanNara Co., Ltd since 2015. He has also been President of Kyunggi High School Alumni Association since 2021. He held several executive positions during his career in various industries such as trade and international affairs, media and broadcasting, electronics, paper, logistics and education. Choi’s achievements have been recognized with prestigious awards, including the Minister of Finance Award (1984), the Order of Industrial Service Merit Iron Tower (1993) and the Order of Industrial Service Merit Silver Tower (2000).