Professor of Virology in the College of Veterinary Medicine at Cornell University,Past President of the American Society for Virology.
Associate Professor in the School of Biomedical Sciences, University of Western Australia
Professor of Tropical Infectious Diseases at Curtin University, Australia
Professor of Virology, Dean Faculty of Natural Science, University the Western Cape, Dean-Elect Faculty of Science, Stellenbosch University, South Africa.
Junior group leader “Membrane Dynamics & Viruses” (MDV),IRIM – Research Institute in Infectiology of Montpellier, France
Assistant Professor at National University of Sciences and Technology (NUST), Pakistan
Director, Center for Emerging arbo and Respiratory virus research, Professor, Infectious disease and oncology research institute, University of the Witwatersrand, Chair of the WHO Scientific advisory group on the origins of novel pathogens, South Africa
Executive Director of Tropical Medicine Cluster at Chulalongkorn University, an advisor of Faculty of Tropical Medicine, Mahidol University, Department of Health, Bangkok Metropolitan Administration and Faculty of Medicine, Thammasat University