Dr. Casey A. Paleos is a psychiatrist and researcher with nearly 15 years of experience in the use of psychedelic medicines for mental health indications, which has included work with psilocybin, ketamine and MDMA. From 2018 to 2023, he served as a Principal Investigator and Study Therapist for the MAPS-sponsored MDMA-Assisted Therapy for PTSD Phase 3 Clinical Trials.

He is the co-founder of Nautilus Sanctuary, a non-profit psychedelic research, education and advocacy organization based in New York City, and a founding board member of the recently formed non-profit professional organization, the International Alliance of MDMA Practitioners.

Dr. Paleos is also the co-founder and Chief Medical Officer of InnerMost, a psychedelic-assisted therapy clinic, practicum training institute and Public Benefit Corporation whose mission is to establish and open-source sustainable best practices and to remove socioeconomic barriers to high-quality treatment access.