His responsibilities included organization change, corporate governance, and strategy formulation in addition to project planning and execution.

Later in 2013, Pengiran Dato Shamhary was appointed managing director of Brunei Shell Marketing (BSM), where he was responsible for the logistics of supply and distribution as well as the sales and marketing plan for companies operating in the land, sea, and air sectors.

[5] Pengiran Shamhary held the job of managing director of Brunei Gas Carriers (BGC) from 1 November 2020 till his nomination as Minister.

[4] He was responsible for the consistency of operations, the growth of regional capabilities, and the creation of the company's long-term plan.

[9] The Air Services Agreement was signed in Brunei in June 2022 by the Minister of Transport and Communications, José Agustinho da Silva, and his Bruneian counterpart, Pengiran Shamhary, who was accompanied by the Minister of Foreign Affairs and Cooperation, Adaljiza Magno.