Hannes Kettner (He/Him) is a PhD student at the Imperial College Centre for Psychedelic Research.

Hannes has designed and coordinated several large-scale observational survey studies over the past four years investigating psychedelic use in naturalistic settings. Under the supervision of Dr. Robin Carhart-Harris, he launched the Psychedelic Ceremony Study, which has yielded the largest dataset to date prospectively following participants in guided psychedelic sessions. Working closely with psychedelic practitioners during this project, Hannes became interested in the question how real-world psychedelic use can be systematically assessed in order to inform harm-reduction and benefit-maximisation strategies for clinical and non-clinical settings. His work on environmental and psychosocial factors involved in the effects of psychedelics has been published in several peer-reviewed journals and has featured in major media outlets. Hannes holds a MSc in Cognitive and Clinical Neuroscience from Maastricht University and is VP of Science and Data for MyDelica, an academic spin-off company developing an app-based tool to collect real-world psychedelic data.