Dr Mliga is a medical graduate of the University of Dar es Salaam, Tanzania, and has specialised in public health (MPH) at the Royal Tropical Institute in Amsterdam, the Netherlands, and health personnel education (MHPEd.) at the University of New South Wales, Sydney, Australia.
He began his career as a general practitioner and trainer of clinical officers and later joined the Centre for Educational Development in Health at Arusha (CEDHA). Where he subsequently became the founding director of the Primary Health Care Institute, Iringa Tanzania.
From 1995 until 2012, Dr Mliga was the director of human resources for health development at the Ministry of Health and Social Welfare of the United Republic of Tanzania.
He is currently part of a team of consultants forming the consortium Praxis for Social Systems Development based at Dar es Salaam, Tanzania. He joined THET as a health adviser in December 2016