Between 1953 and 1954, he served as a member of the Tujuh Serangkai ("Seven Branches") committee,[6][7] tasked with gathering feedback from both urban and rural communities on the proposed Bruneian constitution.

[4] In July 1953, Sultan Omar Ali Saifuddien III formed the Tujuh Serangkai committee, of which Yusof was a member, to design the Bruneian constitution.

[9][10] The Tujuh Serangkai undertook a research trip to British Malaya and Singapore in 1954 to study constitutional systems in states such as Johor, Selangor, and Negeri Sembilan.

Pengiran Muhammad Yusuf, as the committee's secretary, compiled a 50-page report summarising the findings and recommendations, which was presented to the sultan as part of the constitutional development process.

[12] In 1961, Yusof also joined a delegation to the Federation of Malaya, where Pengiran Muda Hashim, as the sultan's personal envoy, presented Brunei's highest honours to Yahya Petra of Kelantan and the Munawir of Negeri Sembilan.

On 2 July 1964, he acted on behalf of the sultan, awarded the Perisai Kedatangan (Arrival Shield) to Pengiran Muda Mahkota Malay School in Kuala Tutong for its outstanding attendance in 1963.