He is also adjunct Professor in the Dalla Lana School of Public Health Sciences and the Joint Centre for Bioethics at the University of Toronto, Canada, and Course Director for Bioethics at Howard College School of Law, UKZN. He is a Senior Consultant to the Ethical, Social, and Cultural Program on Global Health, St Michael's Hospital, Toronto, Canada, which advises the Bill and Melinda Gates Foundation on ethical, social, cultural, and regulatory issues. He serves as a consultant to the World Health Organisation (WHO), United Nations Children's Fund (UNICEF), and United Nations Interregional Crime and Justice Research Institute (UNICRI). He is the Co-Chair of the US NIH’s HIV Prevention Trial Network's (HPTN) Ethics Working Group and is an elected Founding Member, and two-term Co-Chair of the South African Young Academy of Science (SAYAS). He is a member of the South African National AIDS Council (SANAC) Technical Task Team on Ensuring Protection of Human Rights and Improving Access to Justice, and a member of the South African Law Reform Commission's statutory law revision project (Redundancy, obsoleteness and constitutionality of health legislation).
He currently serves on several bodies, including the International Research Ethics Board of Médecins Sans Frontières (MSF), the Research Ethics Committee of the South African Human Sciences Research Council, and the Scientific Advisory Board of the Aurum Institute of Health Research. He serves as a member of the Critical Path for TB Drug Regimens (CPTR) Advisory Panel and as a Special Advisor to the Biomedical Research Ethics Committee of the Nelson Mandela School of Medicine. He has previously served as the Co-Director of the Ethical, Social, and Cultural Issues Advisory Services to the Bill and Melinda Gates Foundation's Grand Challenges in Global Health Initiative, as a member of the World Health Organisation's Ethics Task Force on TB Management, and the US NIH's African Data and Safety Monitoring Board.