Investigator in the Criminal Division of the Gangnam Police Station

Investigator of traffic accident investigation team at Gangnam Police Station

Investigator of the Seoul Metropolitan Police Agency's Security Investigation Unit

Suseo Police Station Detective Division Head of the violent crime unit

Team Leader, Security Investigation Team, Seoul Metropolitan Police Agency

Director, Information Security Division, Chungju Police Station

Director of Ogeum Police Station, Songpa Police Station

Songpa Police Station's Chief of Living Order

Criminal Expert at Sanwoo,Lawfirm