Paul Tregoning is a Professor and Area Head of Climate, Ocean, and Geosciences Group at the Research School of Earth Sciences and a Fellow of the International Association of Geodesy. Paul uses Earth observation data from satellites to study how the Earth's surface changes through geophysical processes, including tectonic deformation, climate-driven variations in sea level, continental hydrology (including groundwater), and melting of polar ice sheets. Paul is a member of the NASA Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Science Team; the ANU Institute for Climate, Energy and Disaster Solutions; and the ANU Institute for Water Futures. He is also member of the Australian Space Agency’s Technical Advisory Groups on Earth Observation and on Positioning, Navigation and Timing.