Stephan joined KFBG in 2009, spearheading the conservation of orchids both in and ex-situ in Hong Kong, South China and the wider Indo-Burma region. His research and integrated approach to conservation have led to the successful reintroduction of rare plants and improved understanding of the threats they face in the wild, including genetic erosion, poaching and illegal trade. He has conducted fieldwork throughout Asia, is active in ecological restoration and is a member of the IUCN-SSC Orchid Specialist Group.