Dr Hannock Tweya, PhD, MSc is an Epidemiologist working in Malawi. He has more than 14 years’ experience focused on improving quality of HIV and TB service delivery including conducting operational research. Currently, Dr Tweya’s work helps to improve treatment outcomes, quality of data for program monitoring and stimulate demand and use of data for informed decisions. He leads management of large longitudinal HIV clinical databases for program monitoring and quantitative analysis. His experience also includes facilitating the design and implementation of an electronic data system in Malawi. He has published more than 80 research projects on HIV patient tracking systems, retention, reproductive health services, tuberculosis and prevention of mother-to-child transmission of HIV in Africa.