After completing his high school studies at Kanyabayonga Institute, Mateus joined the university education at University of Goma and gained his bachelor degree in Biomedical Sciences in 2000. He pursued his education at the same university until he gained a clinical degree as Medical Doctor (MD) in 2004.
Mateus has worked in different hospitals located in different regions in his country, the Democratic Republic of Congo (DRC) and in Rwanda, from 2005 to 2016. He has contributed to the improvement and enhancement of the health systems in those regions. During that time, he was leading 2 non-governmental organizations (Agir Ensemble and Hope Medical Center) for which he is now the senior consultant.
From September 2016 to October 2017, Mateus joined the University of Maastricht in Netherlands to study a Master Program in Public Health (Global Health) which has equipped him with sufficient skills to contribute in overcoming health issues both locally and internationally. In addition, he has gained sufficient competencies in research processes contributing in generating scientific data for new health programs.
During his study at Maastricht University, Mateus was leading a research program for his Master Thesis in the field of Antimicrobial Resistance which is among the biggest international health issues.
After completion of his studies at Maastricht University, he has joined Medecins Sans Frontieres ((MSF), Doctors Without Borders) in December 2017 as Medical Team Lead and Research Program Manager leading a clinical trial project on MDR/XDR-TB in Uzbekistan.
By now, Mateus is a trial programs coordinator for vaccines with Epicentre/MSF in Mbarara/Uganda leading 3 projects: Yellow Fever vaccine fractional dose study, Yellow Fever vaccine dose finding study, and Ebola Vaccine Trial. The study on Ebola Vaccine aims to find an effective vaccine that will be licensed to control the Ebola Outbreak globally.
Mateus has held an international voluntary position as a country ambassador for DRC of the American Society for Microbiology (ASM) since January 2017 to December 2019.