Construction of the school was completed in 1987. It was formerly known as Sekolah Menengah Mumong. It was later changed to Sekolah Menengah Pengiran Jaya Negara Pengiran Haji Abu Bakar in 1998.
Education
The school offers education for Secondary One to Secondary Five students. The school is the only school in Kuala Belait that offers Science stream for lower secondary students. The other school in the nation to do such streaming is Paduka Seri Begawan Sultan Science College. The streaming process admits students of Bruneian citizenship who achieve excellent results for their Primary Six state exam, Penilaian Sekolah Rendah are eligible to enter the Science stream. Others who do not qualify to enter the Science stream in lower secondary take tests which evaluate their proficiency in Mathematics and the English language. After the evaluation, they are sorted into classes of similar learning abilities. Apart from education, students are involvement in co-curricular activities. School discipline is maintained by discipline masters, with assistance from school prefects. The Student Council, which was formed in 2007, takes part in ensuring school discipline apart from dealing with the school administration.
The SMPJN school song was composed in 2004. Malay Kau berdiri tersergam megah Indah mewarnai harapan bangsaku Namamu jadi sebutan Baktimu tetap disanjung Kami sentiasa Diasuh, dididik dan dibimbing Kami berilmu, beriman dan berbakti Demi agama bangsa Dan negaraku yang tercinta Kau berdiri tersergam megah Indah mewarnai harapan bangsaku Sekolah Menengah Pengiran Jaya Negara Pengiran Haji Abu Bakar Kami Berilmu Beriman dan Berbakti Demi agama bangsa Menjadi insan sempurna Kami berilmu Beriman dan berbakti Demi agama bangsa Dan negaraku yang tercinta Sekolahku yang tercinta Sekolah Menengah Pengiran Jaya Negara Pengiran Haji Abu Bakar Gedung ilmuku Menuju kepuncak kejayaan Kepuncak kejayaan, kejayaan. English You stand boldly, Beautifully colouring the nation's hopes Your name is always spoken of Your merits will always be looked high upon We will always be educated We are educated, Pious and devout For the religion and nation To be excellent people We are educated, Pious and devout For the religion and nation And my beloved country. You stand boldly, Beautifully colouring the nation's hopes Sekolah Menengah Pengiran Jaya Negara Pengiran Haji Abu Bakar We are educated, Pious and devout For the religion and nation To be excellent people We are educated, Pious and devout For the religion and nation And my beloved country My beloved school Sekolah Menengah Pengiran Jaya Negara Pengiran Haji Abu Bakar My warehouse of knowledge On our way to the peak of success To the peak of success, success.
