Andreas Maercker is Full Professor and Head of the Psychopathology Division in the Department of Psychology at the University of Zurich, Switzerland. Professor Maercker has been an influential figure in the field of traumatic stress studies for more than twenty-five years. He has made innovative and influential contributions to the differentiation of various disorders in this field as chair of the WHO working group on the classification of these disorders. More recently, he developed an international research program on cultural factors in trauma sequelae. In 2017, he received Germany's highest civil honor, the Order of Merit, for his scientific and volunteer work for trauma survivors.