Clemens Preisinger, D.I. Dr. is a structural engineer and researcher. He started his career as a researcher at the Institute for Structural Concrete at the Technical University Vienna. Since 2008 Clemens is working for the structural engineering company Bollinger–Grohmann. During that time, he contributed to several research projects at the University of Applied Arts Vienna. There he currently heads the department ‘Digital Simulation’ which investigates possibilities to bring computational modelling techniques into early-stage architectural design. Since 2010 Clemens is developing the parametric, interactive Finite Element program ‘Karamba3D’ as a freelancer. He holds a PhD in Structural Engineering from the Technical University Vienna.