Ryan is a Climate Scientist at the Bureau of Meteorology. He received his PhD in physical oceanography from Stanford University in California in 2016. He then worked as an ARCCSS and CLEX postdoc at the University of New South Wales (UNSW) before joining the University of Sydney in 2021. Ryan is a physical oceanographer interested in ocean physics, modelling and climate variability. His research focuses on how small-scale processes such as turbulent mixing and mesoscale eddies can influence the large-scale ocean circulation and climate. He uses theoretical techniques combined with idealized and realistic ocean models to better understand interactions across scales in the ocean and represent them properly in climate models.