A qualified
CPA, he passed the certified public accountant exam and served as a member of the Tax Review Committee at the Jungbu (Central) Regional National Tax Service. He advised major institutions on accounting and taxation. From 1982 to 1985, he was president of the Korean Institute of Certified Public Accountants, during which he contributed to enacting comprehensive tax agency management regulations and helped the organization gain standing director status in the
Confederation of Asian and Pacific Accountants (CAPA) in 1983, as well as hosting the 18th CAPA meeting in Seoul in 1984. == Political career ==