Cholsoo Han possesses "extensive knowledge in the area of Korean competition law" say sources who are "impressed by his analysis" as well as his "hands-on approach".
Cholsoo Han served for 19 years at the Korea Fair Trade Commission (KFTC) and was the authority's secretary general from 2011 to 2014. During his tenure at the KFTC, Cholsoo Han served as a director general of five major bureaus including the Cartel Investigation Bureau, the Competition Policy Bureau, the Anti-Monopoly Bureau, the Market Analysis Bureau, and the Consumer Policy Bureau. He handled numerous big cases including international cartels and abuse of market dominance by multinational corporations. He also played a big part in improving the regulatory system of Korean competition laws and enforcement practices within the KFTC, such as leniency programmes and securing rights of defence for the defendants. After his departure from the KFTC in 2014, he taught competition law and consumer protection laws as a visiting professor at Korea University and served as a guest professor at the Graduate School of Law in Yonsei University. Before he joined the KFTC in 1994, he also served at the Ministry of Strategy and Finance as an assistant director for 13 years. He is the author of two books, Opening of Service Industry and WTO (1994) and Competition Law (2016), which are highly respected by experts in the relevant fields. Since Cholsoo Han joined Yoon & Yang in April 2016, he has successfully handled a number of prominent antitrust cases, including the merger review by KFTC of a major mobile telecommunication company's acquisition of the number-one system operator in Korea and big cartel cases.