1. Senior Programme Officer, Special Programme for Research and Training in Tropical Diseases and Division of Diagnostic, Therapeutic and Rehabilitative Technology, World Health Organization, Geneva, Switzerland
2. Professor of Pharmacology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
3. World Health Organization Clinical Pharmacologist, Tropical Disease Research Centre, Republic of Zambia, N'dola, Zambia
4. Medical Adviser, Pharmaceutical Department, Dow Chemical, Mideast/Africa, Geneva, Switzerland
5. Head of Medicine, Pharma International, Ciba-Geigy Ltd., Basle, Switzerland