Professor Christoph Schär (*1958), currently Full Professor of Climate and Water Cycle in the Department of Environmental Systems Science, is to retire at the end of January 2024. Christoph Schär joined ETH Zurich as an assistant professor in 1992. He is one of the foremost researchers in climate modelling, and was one of the first to use the latest generation of supercomputers for this purpose. Many of his research findings have long been recognised as standard results. He has made a substantial contribution to ETH Zurich, such as by playing a major part in founding the Centre for Climate Systems Modelling, of which he was the first Scientific Director. In addition, he was instrumental in setting up the Institute for Atmospheric and Climate Science, of which he was Director (2001–2006 and 2014–2018).