Sigilbert Mrema is a Statistical Demographer with a specialization in Malaria intervention, Maternal, and Newborn health. Holding a Bachelor's degree of Arts in Land-Use Planning and Environmental Studies obtained in 2001, and a Master's degree of Arts in Demography completed in 2008 at the University of Dar es Salaam, Sigilbert has established himself as a prominent figure in public health research.

His career journey began in 2008 with his role as a Research Scientist at Ifakara Health Institute (IHI), where he was stationed in Rufiji District. Taking charge of managing the Rufiji Health and Demographic Surveillance System (HDSS), Sigilbert's dedication and expertise led to his appointment as the Leader of the Rufiji Site by the IHI management in December 2010.

Throughout his tenure, Sigilbert actively participated in the development of various research projects utilizing the HDSS platform to evaluate health initiatives. These projects included the Evaluation of Effectiveness and Safety Studies of Antimalarials in Africa (INESS), Trial of Pre-Pregnancy Supplementation (TOPPS), Under-five nutritional monitoring, and the Connect project – aimed at improving access to maternal and child health care through the introduction of Community Health Workers.

His contributions encompassed the development of study protocols, standard operating procedure manuals, field staff training, supportive supervisions, data management, data analysis, and publication of burden of disease profiles, policy briefs, and scientific papers. Sigilbert's work has been featured in reputable journals such as the International Journal of Epidemiology, New England Journal of Medicine, Global Health Action, Malaria Journal, BMC Pregnancy and Childbirth, and Maternal and Child Health Journals.

With expertise in statistical demography and research interests in assessing the long-term socio-economic consequences of early childhood health, malaria interventions, and maternal and newborn health, Sigilbert strives to make meaningful contributions to public health and advance understanding in these critical areas.