Director of Investigation Division, Gyeongnam Provincial Police Agency

Chief of Jincheon Police Station

Director of Investigation Division, Incheon Metropolitan Police Agency

Director of the Special Investigation Division of the National Police Agency

Chief of Eunpyeong Police Station, Seoul

Director of the National Police Agency Scientific Investigation Center

the chief of the police department's detective division

Planning and Investigation Officer, National Police Agency

Second Director of Gyeonggi Provincial Police Agency

Director of the National Police Agency's Investigation Bureau

Commissioner of Daejeon Metropolitan Police Agency

Director of the National Police Agency's Security Service

Senior Officer, Police Department Personnel Management Planning Officer

Incheon Metropolitan Police Agency Commissioner

a deputy police chief

Commissioner of the Seoul Metropolitan Police Agency

Adviser, Sanwoo Law Firm