- 41st Korea Bar Exam passed
- 31st Judicial Research and Training Institute, Supreme Court of the Republic of Korea
- Adjunct Professor, Seo Kyung University (Corporate Law
- Defence Attorney of Korean Maritime Safety Agency
- Tax Accountant
- Patent Attorney
- COO, Building Law (Research Center)
- Corporate Council of KORSA
- Advisor, Research Institute of Fair Trade
- Corporate Compliance with SYS Holding, Seoul Milk, KEITI, Insung co, Woori Life, High Tech, Mirae Tech, INS, Mason NFNI (Dongyang Financial), Samwha milling, My Asset, Kumyang Int, Nong Hyup, Korea Technology Finance Corporate, Dongyang Life Insurance, etc