He worked as a chief clerk for the Office of Secondary Technical Schooling[1] and was a member of the Association du Personnel Indigene de la Colonie, a labour union.
[7] In 1958 Nguvulu signed the "Motion to the Minister of the Belgian Congo", which demanded that Belgium grant the Congolese independence.
[11][12] Since the Belgian colonial administration had acquiesced to the concept of Congolese independence, Nguvulu believed that the MNC had succeeded in its original mission.
The MNC leader and Prime Minister, Patrice Lumumba, appointed Nguvulu Secretary of State for Economic Coordination and Planning in his government.
[17] In June 1964 he devised a plan for resolving the Congo Crisis, which involved the institution of a new transitional government, the creation of an economic and social council, and a roundtable discussion between different Congolese leaders.