My research focus lies within structural geology and tectonics, focusing on: -Orogeny and orogenic collapse, with a primary focus on the Scandinavian Caledonides and later also the Brasiliano orogen in Brazil. -Rifting, mostly related to the North Sea rift. -Understanding shear zones and shear zone formation from the microscale to crustal scale. -Transpression/transtension in theory and application. -Fault anatomy, geometry and evolution. -Reactivation of shear zones during brittle faulting. -Deformation bands and other subseismic structures, and their implications for fault nucleation and fluid flow in porous rocks and sediments.