Pengiran Abu Bakar often joined
Sultan Omar Ali Saifuddien III on his travels to isolated villages, including
Friday prayers at the
Kampong Pudak Mosque. He was elevated to Senior Administrative Officer on 1 June 1954, and on 16 February 1955, he was sent to
Seria,
Belait District. On 15 August 1955, he returned to Temburong in the capacity of district officer. On 1 October 1959, he received a promotion to Special Administrative Officer. At the Sultan's direction, he was one of the 19 members of the Legal Committee in 1957, which was tasked with creating a
bill and an
educational policy. In September 1958, Pengiran Abu Bakar and the Sultan traveled to
London, United Kingdom, to negotiate for the
Constitution of Brunei. After the constitution was put into effect, the Sultan formed an 11-member Citizenship Status Law Committee to examine the legislation that Tuan Sufian bin Haji Hashim had written with help from Michael and
Sir Neil Lawson. One of the committee members, Pengiran Abu Bakar, made a substantial contribution to the debates by offering insightful information on the preparation, negotiating, and execution of the constitution. The Brunei Agreement between Brunei and the United Kingdom, the Constitution of Brunei, and the Succession and Regency Proclamation were among the significant documents that were signed on 29 September 1959, by the Sultan, who represented the
Brunei government,
Sir Robert Scott, the British High Commissioner for Southeast Asia, and
Derek Jakeway, who represented the
Governor of Sarawak on behalf of
Queen Elizabeth II. Among the fourteen notable state leaders that attended the occasion was Pengiran Abu Bakar. He served as a Senior Administrative Officer and the first Speaker of the Legislative Council when the constitution was established. == Later life and death ==