Tristan van Doormaal is a vascular and skull base neurosurgeon at the University Hospital Zurich and University Hospital Utrecht. His research focusses on bench to bedside development of new techniques to improve patient outcomes. He is co-inventor of the SELANA technique to perform safe bypass surgeries in the brain and Liqoseal, a patch to prevent cerebrospinal fluid leakage after surgery. He is co-founder of AugmedIT, a startup company aimed at providing surgeon with holograms to better prepare and perform complex surgeries.