A Medical Scientist, with a research focus on Mycobacterium tuberculosis with over 15 years’ experience. He currently head  the the Centre for Tuberculosis at the National Institute for Communicable Diseases/NHLS (South Africa), which incorporated the National & Supranational TB Reference Laboratories. He leads diagnostic evaluations, drug resistance determination and surveillance using next-generation sequencing, molecular epidemiology of tuberculosis and the application of novel technologies for these purposes. He has contributed to national and global policy guidance and facilitated national implementation of new TB diagnostics for routine laboratory use