Dr. Ruggajo is a consultant nephrologist at Muhimbili National Hospital, a senior lecturer, head of department of Internal medicine and head of the renal research group at Muhimbili University of Health and Allied Science (MUHAS). He teaches and mentors medical and graduate students in their research projects. He holds PhD in Clinical Epidemiology (Outcomes) - Low birth weight and chronic kidney disease. Currently, he is a post-doc research fellow at Harvard School of Public Health, Boston, MA focusing on HIV and CKD. Has a solid background in medicine, nephrology and medical education for both undergraduate and graduate medical students. His competence areas include clinical epidemiology and research methods, study designs, patient registry development, data collection, management and analysis. In addition, he is capable of providing leadership in the grant application and grant management as well as building networks in research, healthcare and education. His research areas of interests encompass investigating the Developmental Origins of Health and Disease (DOHaD) model, exploring the association between low birth weight and future kidney disease (Brenner’s Hypothesis), Sickle Cell Nephropathy, Diabetic Kidney Disease, Cardio-Renal Diseases and the epidemiological exploration on the impact of double burden of Communicable and Non-Communicable Diseases in Tanzania and the sub-Saharan African region. Currently, he is working as a Research coordinator and Kidney Disease Study Lead for Sickle Pan African Research Consortium (SPARCO)-Tanzania, MUHAS.