- CEO, TBN KoROAD
- Director of Personnel Division,Foreign Affairs (Investigation, Planning)Division, Korean National Police Agency
- Chief of Seoul Songpa, Gyeonggi Gwangju, Gyeongnam Namhae Police Station
- Public Security Cunsulate, Consulate General of The Republic of Korea In Chicago
- Senior Inspector of Drug Crime, Korean National Police Agency
- Senior Inspector of Security Investigation Division, Busan Metropolitan Police
- Superintendent of Criminal and Security Division, Busan Geumjeong Police Station
- Inspector, Korea Coast Guard
- Advisor, Incheon Metropolitan City, Incheon Community Media Foundation, Jungbu Coast Guard, Korean Association Against Drug Abuse, Incheon Foundation For Arts & Culture, Korea Trade Commission, Korea International Cooperation Agency
- Crime Detection Investigation Training(Japan), International Drug Control Training(Israel)
- Complete The International Terrorims, Illinois Institute of Technology
- Complete The Police Leadership Training Program
- Complete The CEO Course, Yonsei, Hanyang, Dankuk, Korea National Sport, Tsinghua University