Professor for Developmental and Clinical Psychology at Freie Universität Berlin. From April 2004 to March 2010 “Juniorprofessor” (Assistant Professor) for Educational and Developmental Psychology and since April 2010 “Univ.-Prof.” (Full Professor) for Developmental and Clinical Psychology at Freie Universität Berlin, Germany. Head of the Division “Developmental Science and Applied Developmental Psychology”. Since 2006 Faculty Member at the International Max Planck Research School “The Life Course: Evolutionary and Ontogenetic Dynamics” at Max Planck Institute for Human Development, Berlin. Since 2007 member of the Scientific Advisory Council of the “Stiftung Deutsches Forum für Kriminalprävention (DFK)”. Member of several Scientific Advisory Boards (e.g. Zentrum für Kinderschutz im Internet, I-KiZ; Nationales Zentrum für Kriminalprävention, NZK) and Scientific Networks (e.g. EU COST-Action “Coping with Cyberbullying”). Experiences in the development, evaluation, and large-scale implementation of preventive intervention programs and early intervention programs, e.g. in early education (www.papilio.de) or in schools (www.fairplayer.de, www.medienhelden.info). Partner and/or PI in several research consortiums (e.g. NETWASS; PROPHETS, Mindb4Act). Editor-in-Chief of the International Journal of Developmental Science.