Mark Krockenberger is Associate Professor of Veterinary Pathology at the University of Sydney who has been working with koalas for the past 20 years. He is a Fellow of the Australian and New Zealand College of Veterinary Scientists in Veterinary Anatomical Pathology and a registered specialist veterinary pathologist and he is Associate Head of Clinical Services in the Sydney School of Veterinary Science. MarkĀ is an active researcher in koala diseases, particularly cryptococcosis, and assists many groups and vets managing this disease in captive or wild animals. Currently, he is involved in a large and exciting research project examining the intersection between ecology and disease in the Gunnedah region.