Hannes has studied biosciences, philosophy, and psychology in Heidelberg and holds a MSc in Neuropsychology from Maastricht University. He is currently a member of the Centre for Psychedelic Research at Imperial College London. While studying in the Netherlands, Hannes was involved in research with psychedelic experience providers for the first time. Through this interaction he became interested in how cognitive and mental health research can be integrated into and informed by naturalistic settings of psychedelic and plant medicine use, which is the focus of his work at Imperial.