Director of the Criminal Division of the Investigation Division of the Seoul Metropolitan Police Agency

Public affairs officer of the National Police Agency

Police officer in Washington, D.C.O

Planning and Information Review Officer of the National Police Agency

Director of the National Police Agency's Bureau of Investigation

Daegu Metropolitan Police Agency Commissioner

Busan Metropolitan Police Agency Commissioner

Deputy chief of the National Police Agency

9th Chief of the Korea Coast Guard

the 15th Commissioner of the National Police Agency

Professor of Police Administration, Daegu National University of Arts

Advisory lawyer, BKL

Partner, Sanwoo Lawfirm