1. PhD Psychology, is the Director of the Alcohol, Tobacco and Other Drug Research Unit at the South African Medical Research Council, Cape Town, South Africa
2. Extraordinary Professor at the Department of Psychiatry, University of Stellenbosch, Tygerberg, South Africa
3. PhD Psychiatry & Mental Health, is a Senior Scientist at the Alcohol, Tobacco and Other Drug Research Unit, at the South African Medical Research Council, Cape Town, South Africa
4. Honorary Lecturer at the Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
5. PhD Public Health & Family Medicine, is a Senior Scientist at the Alcohol, Tobacco and Other Drug Research Unit, at the South African Medical Research Council, Cape Town, South Africa
6. Honorary Research Associate at the Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa