Tillmann Klein studied architecture at the RWTH Aachen, completing with a degree in 1994. From then on he worked in several architecture offices, later focussing on the construction of metal and glass facades and glass roofs. Simultaneously he attended the Kunstakademie in Düsseldorf, Klasse Baukunst, completing the studies in 2000 with the title “Meisterschüler”. In 1999 he was co-founder of the architecture office rheinflügel baukunst with a focus on art related projects. In 2005 he was awarded the art prize of Nordrhein-Westphalen for young artists. Since September 2005 he leads the Facade Research Group at the TU Delft, Faculty of Architecture and from 2008 to 2016 he was director of the façade consulting office Imagine Envelope b.v. in Den Haag. Tillmann Klein is editor in chief of the scientific open access ´Journal of Façade Design and Engineering´ and since 2015 he is guest professor for Design and Building Envelopes at the Technische Universität München.