Eiko is a psychologist, methodologist, and nearly photographer. He obtained his PhD in clinical psychology at the Free University of Berlin, followed by four years of postdoctoral training in methodology at KU Leuven and University of Amsterdam. He returned to clinical psychology in 2018, at Leiden University. He works at the intersection of clinical psychology, psychiatry, epidemiology, methodology, and complexity science, and enjoys dabbling in philosophy of science. His interests are how to best understand, measure, model, and classify mental health problems—and in improving cumulative psychological science through open science practices. He loves burnt coffee and fast computers, and is humbled to get to work with many fantastic researchers from all over the world.