From 1983 to 1989 he was rector of the Holy Family Intermediate Seminary in Nakhon Ratchasima, and then till 1993 under-secretary of the Catholic Bishops' Conference of Thailand, as well as rector of Lux Mundi National Major Seminary in Sam Phran since 1992.
Dari 1983 sampai 1989, ia menjadi rektor Seminari Intermediasi Keluarga Kudus di Nakhon Ratchasima, dan kemudian sampai 1993 sekretaris bawahan Konferensi Uskup-Uskup Katolik Thailand, serta rektor Seminari Mayor Nasional Lux Mundi di Sam Phran sejak 1992.