John Sader is an applied mathematician with over 30 years of experience, specializing in collaborative research with experimentalists. He has co-authored publications with 272 collaborators from 19 countries across a broad range of fields, including fluid and solid mechanics, colloid science, plasmonics, and advanced scientific instrumentation. This includes experimental methods that are used widely in atomic force microscopy. John earned his PhD in electrical engineering from the University of New South Wales before joining the University of Melbourne in 1992 where he became Professor of Applied Mathematics. During that time, he held visiting research positions at institutions including Caltech and Trinity College Dublin. In 2022, he joined Caltech as Research Professor of Aerospace and Applied Physics. John is an elected Fellow of the Australian Academy of Science, the Australian Mathematical Society, and the Australasian Fluid Mechanics Society.