Dr. Stewart is a specialist Emergency Physician practicing since 2003 in the US and in Norway. He trained at the UNM School of medicine in Albuquerque, UT Austin and OHSU, Portland. He served as Emergency Department Chair at WF Hospital and as an associate clinical professor at OHSU. He worked as a board member of the Norwegian Society of Emergency Medicine to bring the specialty to Norway. He was a cofounder of Insight Ketamine in New Mexico in 2016, Axon Clinic in 2018, and the first public ketamine treatment unit in Scandinavia at Sykehuset Østfold in 2020. His past research includes studies on the evolution of emotions and winter depression. He has also studied complexity theory at the Santa Fe Institute, space medicine at the Institute of Biomedical Problems of the Russian Academy of Sciences, and international public health. His current research interests include using novel psychoactive medications in the treatment of mood disorders and addiction. He is a medical consultant for PsykForsk, DPS Nordre Østfold working on clinical trials with psilocybin, MDMA, ketamine and esketamine, (site-initiated and previously with MAPS and COMPASS). He is an advisor to the public ketamine treatment center at DPS Moss, assisting and training additional treatment centers in the public health system. He served as the Regional Director for Awakn Life Sciences, and is now the medical Director of Axon Clinics. He is a founding member of the national research group Norwegian Rapid-Acting Antidepressant Network (NORAAD), the psychedelic research group at the Department of Psychology at the University of Oslo and the Eating Disorder Lab at Oslo Nye Høyskole. Dr. Stewart is the co-founder of the Norwegian Association for Psychedelic Science, an Expert Faculty Member of the American Society of Ketamine Physicians and serves as an associate editor for the Journal of Psychedelic Studies.