Prof. Christel M. Marian, regular member of the North-Rhine Westphalian Academy of Sciences and Arts, heads the Institute of Theoretical and Computational Chemistry at Heinrich-Heine-University Düsseldorf since 2001. She studied chemistry in Cologne and Bonn. She graduated in 1980 with a Ph.D in Theoretical Chemistry at the University of Bonn under the supervision of Prof. Sigrid D. Peyerimhoff. After a postdoctoral stay at the Theoretical Physics Department of Stockholm's University (Sweden) in the group of Prof. Per E. M. Siegbahn, she became assistant professor at the University of Bonn where she completed her habilitation in 1991. Before joining the Heinrich-Heine-University as a full professor, she led the computational chemistry team at the Fraunhofer Scientific Computing and Algorithms Institute in Sankt Augustin. Among other scientific community services, she coordinated the Collaborative Research Center 663 "Molecular Response to Electronic Excitation" and was chairperson of the Interdisciplinary Graduate and Research Academy Düsseldorf (iGRAD) at Heinrich-Heine-University. Between 2011 and 2015 she was Dean of the Mathematical and Natural Science Faculty. Her research centers on the development and application of theoretical and computational excited-state electronic structure methods, with a particular emphasis on spin-forbidden transitions.