In 1954, Wachuku lost the Eastern Regional election and ceased to be a member of the House of Representatives. Later on in 1954, when the principle of direct election to the House of Representatives was introduced, he was re-elected first member for the Aba Division in the House of Representatives; as well as member of United Nigeria Independence Party – amalgamation of NIP and another party. In 1957, Wachuku became Deputy Leader of opposition when he joined the NCNC. From 1957 to 1959, he was a Board member of the Electricity Corporation of Nigeria. Also, in 1957, for the following three years, he was appointed member of the Local Education Authority and chairman of the board of Education in the Eastern Region of Nigeria. During the same period, Wachuku was also Chairman of Aba Divisional Committee of the NCNC.