Paul is an Honorary Professorial Fellow in the School of Geography. He decided to quit full-time work when he turned 60, and that's what happened at the end of 2017. Prior to that, he was variously a professor in the Institute for Sustainability and Innovation at Victoria University, an ecologist in the CRC for Sustainable Tourism, principal aquatic ecologist in the consulting firm Sinclair Knight Merz, a senior research scientist in CSIRO Division of Land and Water, and lecturer in the Department of Botany at Monash University. His main research interests remains the ecology of coastal wetlands. Non-research interest include Australian history, art, pre-war blues and popular music from 1950−1975, and the phenomenon of grey nomadhood.