Dr. Siegfried Kasper is Professor Emeritus of Psychiatry and former Chairman of the Department of Psychiatry and Psychotherapy at the Medical University of Vienna, Austria. Born in Salzburg, Austria, he was educated at the medical schools of the University of Innsbruck, Austria and the Universities of Freiburg and Heidelberg, Germany. Dr. Kasper gained clinical and research experience in psychiatry at the Central Institute of Mental Health, Mannheim, Germany, the Psychiatric Department of the University of Heidelberg, Germany, the Clinical Psychobiology Branch of the National Institute of Mental Health, Bethesda, Maryland/USA, and the Psychiatric Department of the University of Bonn, Germany; in neurology at the Neurological Department of the University of Heidelberg in Mannheim; and psychotherapeutic and psychoanalytic training at the Ausbildungsinstitut für Psychotherapie und Psychoanalyse in Heidelberg/Mannheim, Germany. Dr. Kasper published more than 600 in PubMed listed publications (Google: Citation Index: 51.746; Hirsch-Index: 112, i10-index: 719) and more than 250 books or book chapters, in various areas of psychiatry. He concentrates on the biological bases of mental disorders and their possible treatment approaches. Furthermore, he has conducted studies in psychopathological as well as clinical areas. Dr Kasper is a frequent national and international speaker and continues to be actively involved in research programmes studying depression, anxiety, psychosis, and dementia. Dr. Kasper serves/served on the executive committees and advisory boards of several national and international societies, such as the Austrian Association of Psychiatry, Psychotherapy and Psychosomatic (ÖGPP), the European College of Neuropsychopharmacology (ECNP) and the European Psychiatric Association (EPA). From 2005 to 2009 Dr. Kasper was President of the World Federation of Societies of Biological Psychiatry (WFSBP) and has been appointed as Honorary President of the WFSBP in 2013. He has been elected to the Executive Committee of the International College of Neuropsychopharmacology (CINP) for the period of 2012 to 2018, served from 2018-2021 as President and is now immediate Past-President of this society. Moreover, Dr. Kasper was Chair of the World Psychiatric Association (WPA) Section of Pharmacopsychiatry from 2012-2019. He is Founding President of the Austrian Society of Neuropsychopharmacology and Biological Psychiatry (ÖGPB) and of the Austrian Society of Drug Safety in Psychiatry (ÖAMSP). Furthermore, he is a Honorary Member of the Czech Society of Neuropsychopharmacology, the Romanian Society of Neuropsychopharmacology, the Hungarian Psychiatric Association and a Fellow of the Scandinavian College of Neuro-Psychopharmacology (SCNP) and of the Ukrainian Association of Psychiatry. He is a member of the Academia Europaea as well as the European Academy of Sciences and Arts (EASA). Dr. Kasper has been honored with the doctorate honoris causa of the Universities Craiova and Cluj-Napoca in Romania, as well as the Aristotle University in Thessaloniki in Greece.Furthermore, he has been appointed as Honorary/Visiting Professor at the following universities: University of Hong Kong, China, in 2004; Universidad Andrés Bello, Santiago de Chile, Chile, 2014; Aino University in Osaka, Japan, 2015; Kolkata Institute of Psychiatry, Department of Health & Family Welfare, India in 2016; University of Hiroshima, Japan, in 2017 and Belgrade University School of Medicine, Serbia, in 2017.