Massambu holds the Postgraduate Diploma in Co-operative Business Management (PGD-CBM) from the then Moshi Co-operative College and MBA in International Business From Indian Institute of Foreign Trade (IIFT) Deemed University. He is among the employees of the then Moshi Co-operative College for about 21 years ago and has been in service since then. He has served the University in various positions. Such positions include that of the Head of Administration Information Communication Technology Department, Chief Accountant, and Depute Human Resource Development and Administration. Massambu has also been offering service to the Public through working with various Boards, Committees and Experts Teams. His vast experiences in international business finance, financial management, business management, co-operative development, globalization, entrepreneurship and competitive business strategies vouch his abilities in handling various matters related to business management. Massambu has also carried out various consultancies in areas of co-operative, finance, business strategic, governance policy and cross cutting issues. He has also published extensively on area of interest including co-operative, finance, business management and cross cutting issues.