Joel is an epidemiologist working with the University of the Witwatersrand at Wits Reproductive Health and HIV Institute. He has a joint appointment as a researcher at the School of Clinical Medicine, Faculty of Health Sciences.
He has experience in conceptualizing, designing, implementing, and analysing rigorous quantitative observational and experimental studies (cluster-randomized trials, randomized clinical trials), systematic reviews and meta-analysis, implementation science and classical epidemiology studies. His research interests has been on HIV, Alcohol and Other Drug Use, Mental Health, and Health Systems in Africa.
He is a member of the editorial board for the BMC Global Health Research and Policy journal.
He holds an MD (equivalent to MB BCh) from the University of Dar es Salaam, Tanzania and an MSc in Epidemiology from Harvard University, USA and a PhD in Epidemiology from the University of London (London School of Hygiene and Tropical Medicine), UK.