Marius Pieterse is a Professor at the University of the Witwatersrand Law School and serves as an ex-officio member of the SECTION27 board. He has previously worked as a researcher for Judge LWH Ackermann at the Constitutional Court. Pieterse, who has a Y1 rating from the National Research Foundation, has published extensively in areas that include health law, constitutional law, human rights law and urban development. He is currently a contributing editor to Urban Joburg, a blog interrogating various aspects of Johannesburg life from a rights-based perspective and has engaged in various initiatives to reclaim the city. Pieterse is also the joint coordinator of the International Research Group on Law and Urban Space.