Paul Tregoning is a geophysicist who uses space-geodetic observations to study changes in the Earth caused by different geophysical processes such as tectonic deformation, climate-driven variations in sea level and polar ice caps and tidal deformation. He is the Associate Director (Research) and Head of the Geodesy Group at the ANU Research School of Earth Sciences, an InSpace Mission Specialist (Earth Observations) and an Editor of the Journal of Geophysical Research – Solid Earth.