Crowther became the first resident priest when Kuala Belait was made a head station in 1936.

Piet de Wit founded the first Catholic school the next year after being tasked with supporting Fr.

Additionally, Kuala Belait saw the establishment of the Roman Catholic Mission around this time.

The location of the wooden church/school was situated between the current Chung Hua Middle School and the Foo Chow Association.

Gerard Rottinghuis was named principal of the Seria and Kuala Belait English Schools by 1950.

Herman Plattner formally opened the Kuala Belait Roman Catholic Church during Christmas 1953.

John Maher began working as a teacher at the Seria English School in 1954.

Van de Laar underwent eye surgery while on a six-month vacation in the Netherlands and returned to Kuala Belait in February 1968.

Bishop Anthony Galvin blessed the location of the new St. John's Church in 1970 with the help of Fr.

The new church's construction started in 1971, and on 12 March 1972, Bishop Anthony Galvin dedicated and inaugurated it.

Cornelius had charge of the three parishes in Seria, Kuala Belait, and Bandar Seri Begawan until Fr.

[5] Archbishop Alberto Tricarico formally opened the newly constructed, air-conditioned Parish Hall on 5 June 1993, as part of the rectory's 1992 enlargement project, which started in July and was finished in 1993.