Before setting up Urban LandMark, he worked for two years in government, establishing a research unit in the national Department of Housing (now the Department of Human Settlements). Mark was also with the Council for Scientific and Industrial Research (CSIR) for 13 years. He has researched and published in the areas of housing extensions, home-based enterprises, environmental aspects of informal settlements, and land and housing markets. He can be contacted at mark@urbanlandmark.org.za or +27 12 342 7636.