Leickness Chisamu Simbayi is a South African research psychologist and professor. He is the current Deputy Chief Executive Officer for Research of the Human Sciences Research Council where he studies the social aspects of STIs and HIV/AIDS. In 2002, Simbayi was a part of the research team that conducted the first South African National HIV Prevalence, Incidence, Behaviour and Communication Survey and has been involved in the implementation of all subsequent surveys.