Pak Yong-sik was appointed vice-director of the Political Department of the Korean People's Army sometimes before January 2015, having previously served as an official of the Ministry of People's Security.
Pak Yong-sik terpilih sebagai wakil direktur dari Departemen Politik Umum Tentara Rakyat Korea kira-kira sebelum Januari 2015, setelah sebelumnya menjabat sebagai anggota resmi Kementerian Keamanan Rakyat.