The following September he enrolled in the Université catholique de Louvain's Institute of Applied Psychology and Pedagogy.

[2] He was selected by Patrice Lumumba to lead the Mouvement National Congolais delegation to the economic portion of the Belgo-Congolese Round Table Conference in Brussels from 26 April to 16 May 1960.

[3] On his initiative the delegations formed a "Front National" to develop a unified negotiating position.

[4] Following the independence of the Congo, Losembe served as secretary-general of the Ministry of Education,[5] though he resigned after only a few weeks in office.

[9] In 2007 he was elected to the Congolese Senate as a member of the Forces du Renouveau party to represent Orientale Province.