Richard is a vertebrate palaeontologist with expertise in the systematics, evolution and biogeography of late Palaeozoic to Mesozoic reptiles. His research addresses major patterns and drivers of biodiversity change through deep time, particularly as exemplified by four-limbed vertebrates (tetrapods), over the last 375 million years. He is also interested in the origin and dramatic evolutionary radiation of dinosaurs and closely related fossil groups in the aftermath of the Permo-Triassic mass extinction, the largest extinction event in the history of life on Earth. In addition to research, he acts as Director of Research for the College of Life & Environmental Sciences.