[8] He started his career as an assistant, running messages and holding items for the European wireless officer.

[11] In April 1929, L. R. Watts, the Wireless Engineer, was summoned back to Singapore, and for the rest of the year, Pengiran Mohammad, the Chief Operator or State Wireless Officer,[12] served as the officer in charge of the department.

[10] When the Japanese invaded and occupied Brunei during World War II, they drove out all foreigners, leaving just the native labour, including Pengiran Mohammad, who had been working in telecommunications for the British.

[14][12] Before Australian soldiers arrived in Borneo in the middle of 1945, the area was heavily bombed by Allied Forces and held by the Japanese military.

[14] He later sent a letter from prison, with it discussing both political and personal aspects of the Japanese occupation period.

That's one big question mark to me.In 1946, he was subject of a profile written by T.S Monks recounting the hardship he personally faced during World War II, published on the Sydney Morning Herald.

The article states that in May 1945, he was hiding in a hut in the jungle along with a Chinese Singaporean man called Chiam where both had contracted malaria.

Awarded the title of "National Hero" for his perseverance and expertise in radio technology in order to communicate with the British Forces.

[3] During the 1960s and 1970s, he was an active member of the nobility and was selected to represent Brunei Darussalam at several important events.

[17] He was a part of a six-person delegation to Malaysia to discuss the terms for Brunei Darussalam's entry into the Malaysian Federation.

[18] He was a member of the entourage of Al-Marhum Sultan Omar Ali Saifuddien III to Calgary in 1964.

[22] According to the Brunei Annual Report 1971, he succeeded Prince Mohamed Bolkiah to the title of Duli Pengiran Temenggong.

[23] In 1976, he oversaw the passing out parade of the 37th Recruit Intake of the Royal Brunei Malay Regiment at Bolkiah Camp.

It was attended by several officials which included the British High Commissioner, Wazirs, Cheterias, Manteri-Manteri, and Sultan Hassanal Bolkiah himself.

Mas Miri and Yang Amat Mulia Pengiran Anak Haji Mohammad Ali.

Upon taking up as one of the Wazirs of Brunei, he was bestowed the title of Yang Teramat Mulia Seri Paduka Pengiran Temenggong Sahibul Bahar at Lapau, on 20 October 1971.