The multidisciplinary MUST2SEA project aims at a better understanding of the current tectonic evolution of Sulawesi (Indonesia) with more emphasis on both inter- and post-seismic plate deformations. It will combine up to two decades of space geodetic data (global navigation systems, synthetic aperture radar and radar altimetry missions) with scientific findings obtained during previous successful NWO/GO and EU-ASEAN projects (GEODYSSEA, SEAMERGES, GEO2TECDI-1/2). The final goal is to provide a better assessment of seismic risk, in particular for the area of Palu, the second largest city on the island. Our exclusive GPS database (1992-present) remains key input to this study as it provides a high spatial coverage in SE Asia. Our project includes making data and processing products readily accessible (online) to the global scientific community and disseminating the final results to the (local) authorities and the general public in Palu. The GPS time series (displacement rates) exhibit numerous co- and post-seismic 3D deformation patterns, as well as measurements of vertical motions that provide valuable input to absolute land-subsidence and relative sea-level change studies. We will exploit the latest state-of-the-art geodetic techniques to re-analyze the entire geodetic database and also try detect any additional land surface (vertical) deformation signals that might have been overlooked in previous analyses (e.g. earthquake pre-cursor events) and evaluate their significance using state of the art geophysical models. This requires a multi-disciplinary approach combining different expertise, methods and data, both in situ and by satellites.