Bill Brennan is a psychologist in New York City who serves as a member of the clinical research team at Cybin Inc. where he has codeveloped the EMBARK approach to psychedelic-assisted psychotherapy with Dr. Alex Belser. In the past year, he has coauthored several treatment manuals in the EMBARK approach for Cybin’s forthcoming clinical trials and an ongoing clinical trial at the University of Washington evaluating the efficacy of psilocybin in the treatment of COVID-related depression and burnout in frontline health care professionals. He also serves as a clinical supervisor for this trial. He conducted his dissertation work on the topic of ethical relationship and boundary-setting in psychedelic work and has written, spoken, and consulted on various other topics in psychedelic-assisted therapy. An essay of his entitled “The Revolution Will Not Be Psychologized: Psychedelics’ Potential for Systemic Change” was recently included in the edited volume Psychedelic Justice: Toward a Diverse and Equitable Psychedelic Culture. He has spent several years studying a somatically-oriented, liberatory group therapy approach called Somaterapia in Rio de Janeiro, Brazil. Prior to this, he worked in community psychology settings in NYC and in neuroscience research at New York University, Columbia, and the University of Washington.