The post-doctoral associate (PDA) will perform collaborative research titled "Greenland-scape" under the guidance of a PI at GSFC and two Co-Is at partner institutions  The PDA will investigate the use of the NASA-supported Ice Sheet System Model (ISSM) to infer horizontal variability in both subglacial topography and sliding rate across slow-flowing regions of the Greenland Ice Sheet by inverting medium-complexity ice-flow models. These models will be constrained by satellite-velocity and airborne radar-sounding observations, and the PDRA will validate them against more physically complete COMSOL models. Finally, they will help incorporate into an update to the BedMachine Greenland product and use this result to further elucidate Greenland’s subglacial geology when synthesized with other geophysical datasets (e.g., seismics, gravity and magnetics).