As a geodynamicist my main interest is understanding how geological processes work, from the grain scale to the scale of a planet. We predominantly do this with the help of mathematical and numerical models, for which we develop new approaches in our group. Ongoing research projects include lithospheric-scale shear localization, the coupling between melt migration and lithosphere deformation, the formation of fold-and-thrust belts, the coupling between erosion, lithosphere dynamics and mantle flow, the dynamics of subduction zones as well as the development of new software that runs on high-performance computing systems.