Pengiran Abu Bakar served as a clerk at the office of
British Resident in 1920 at the age of 14, and later served at the Kuala Belait Customs Department in 1923 and 1929. He continued serving as a clerk at Brunei Town and Tutong District office from 1926 until 1928. In 1959, he alongside then-
Prince Hassanal Bolkiah and
Prince Mohamed Bolkiah visited the
Seria oil field in
Belait District. In 1962, he was elected as the
secretary general of Brunei Students' Association in the United Kingdom. Upon his retirement from government services in 1962, based on his excellent service record Pengiran Abu Bakar was appointed administrative assistant at the Development Department and later at the Election Office. During his tenure, he led a delegation, as
chairman, which consisted of Salleh Kadir and
Pengiran Jaya were sent to attend the
1969 Malaysian general election on 10 May. In 1971, he was appointed District Officer of Belait. On 10 June 1972, he officiated the Students' Day Celebration at the Muhammad Alam Malay School,
Seria. On 1 December 1974 the Sultan appointed Pengiran Abu Bakar as the Speaker of the Legislative Council to replace
Pengiran Anak Mohamed Alam who retired from the position. == Death ==