After returning to
British Malaya in 1931, Abdul Wahab started working for the government as a chamber officer in the
Malaysian High Court for six months in the FMS. From 1931 to 1947, he was a practitioner in Ipoh. Tunku Abdul Rahman, reportedly referred to him as "one of the powerful Malay leaders of the day." and he led move of the organisation's headquarters to Ipoh, Perak. Perak served as the administrative hub of UMNO until 1949, when Malays all over the
Peninsula began to embrace the organisation. He later held other Executive positions, such as Secretary of Legal Affairs. He also led the demonstration against the
Malayan Union. On 1 February 1948, he was appointed as
Menteri Besar of Perak (MB), becoming the state's chief
civil servant. During his tenure at the
Kuala Kangsar district office in the mid-1950s, he observed an order he sent out to all district offices, instructing them to steer clear of institutions of worship while purchasing land for public use. He led UMNO Perak until his removal in 1953, following Dato Onn's departure from UMNO in 1951. He then founded the short-lived non-communal National Association of Perak, which was connected to Dato Onn's
Parti Negara. He participated in the
1956 London Merdeka negotiations as a member of the Malayan delegation. He spent long nights going over all the memos and the draft constitution with Tunku Abdul Rahman and
Tan Tong Hye of the
Malaysian Chinese Association (MCA) in his capacity as the sultan of Perak's envoy. In 1957,
Omar Ali Saifuddien III, the
Sultan of Brunei, dispatched a mission to London to discuss the constitution with the
British Government, with final negotiations moved from 27 September to 30 September. The main focus of the
1957 London negotiations was the , written by Abdul Wahab in Brunei House,
Singapore. == Retirement and death ==