Professor emeritus, University of the Witwatersrand

University of Cape Town

Associate Professor in Archaeology and Heritage Studies, University of Dar es Salaam

Professor of Archaeology, University of New England

Griffith University

Rock Art Research Institute, Wits University, retired

Distinguished University Professor, American University in Cairo

Rock Art Research Institute, University of the Witwatersrand

Independent Scholar, Founder 'Archaeology Travel'

Professor of Archaeology, Flinders University