Graham Alexander is a Professor of Herpetology at the University of the Witwatersrand. He attained his PhD at Wits in 1996 and has now been on the academic staff of Wits for 26 years. He runs a research laboratory in the School of Animal, Plant and Environmental Sciences that focuses on ecology, physiology, biogeography and conservation of reptiles. He has a particular interest in elucidating causality of range limitation in reptiles, and using this information for conservation purposes. Currently, he is focusing attention on the importance of snakes as predators in South African ecosystems. He is an A-level Certified Natural Scientist and serves on the IUCN’s Boa and Python Specialist Group, the Viper Specialist Group and also on the IUCN Southern African Regional Specialist Group (Co-Chairperson). He is a committee member of International Herpetological Committee, committee of the Herpetological Association of African, and chair of the editorial committee of African Journal of Herpetology. He has supervised 19 graduated Phd and MSc students and published 65 peer-reviewed papers. He has also authored a book, 8 book chapters, and 36 taxonomic accounts for the reptile and fogs atlases.