Prof. Lawrence Steinman

Executive Chairman and Co-Founder

Prof. Lawrence Steinman has served on our board of directors since August 2020. Prior to joining Pasithea, he served on the Board of Directors of Centocor from 1989 to 1998, the Board of Directors of Neurocine Biosciences from 1997 to 2005, the Board of Directors of Atreca from 2010 to 2019, the Board of Directors of BioAtla from 2016 to the present, and the Board of Directors of Tolerion from 2013 to the present. He is currently the George A. Zimmermann Endowed Chair in the Neurology Department at Stanford University and previously served as the Chair of the Interdepartmental Program in Immunology at Stanford University Medical School from 2003 to 2011. He is a member of the National Academy of Medicine and the National Academy of Sciences. He also founded the Steinman Laboratory at Stanford University, which is dedicated to understanding the pathogenesis of autoimmune diseases, particularly multiple sclerosis and neuromyelitis optica. He received the Frederic Sasse Award from the Free University of Berlin in 1994, the Sen. Jacob Javits Award from the U.S. Congress in 1988 and 2002, the John Dystel Prize in 2004 from the National MS Society in the U.S., the Charcot Prize for Lifetime Achievement in Multiple Sclerosis Research in 2011 from the International Federation of MS Societies and the Anthony Cerami Award in Translational Medicine by the Feinstein Institute of Molecular Medicine in 2015. He also received an honorary Ph.D. at the Hasselt University in 2008. He received his BA (physics) from Dartmouth College in 1968 and his MD from Harvard University in 1973. He also completed a fellowship in chemical immunology at the Weizmann Institute (1974 – 1977) and was an intern and resident at Stanford University Medical School.

Dr. Tiago Reis Marques

Chief Executive Officer and Director

Dr. Tiago Reis Marques has served on our board of directors and as Chief Executive Officer since August 2020. He is a senior clinical fellow at Imperial College London and a lecturer at the IoPPN, King’s College London. IoPPN is ranked second in the world for psychology and psychiatry by US News and Best Global Universities, and is home to one of the world’s largest centers for neuroscience research. Dr. Marques is also a psychiatrist at Maudsley Hospital. His research focuses on topics including the mechanism of action of psychiatric medication and novel treatment targets. During his career, he has obtained multiple awards for his research. Dr. Marques is an author or co-author of more than 100 scientific publications in peer-reviewed journals in psychiatry and neuroscience, has co-authored international treatment guidelines and written book chapters, including in the leading book in the field, “Neurobiology of Mental Illness.”

Dr. Yassine Bendiabdallah

Chief Operating Officer, Director, and Head of UK Clinics

Dr. Yassine Bendiabdallah has served on our board of directors and as Chief Operating Officer since March 2021. He also co-founded Pasithea Therapeutics Corp. and is currently Head of UK Clinics. Dr. Bendiabdallah is an expert in functional medicine and bio-identical hormone therapy. He completed a Masters in Pharmacy at King’s College London in 2006. He was then awarded a PhD scholarship within Cancer Research UK group at University Colleges London which was completed with honours in 2010. He then went on to work for a number of pharmaceutical companies and held research position at University College London. He has been involved in several startups including HelloDr (HelloDr Ltd, Proximal Health Ltd) an online tech in healthcare, Androgenix Pharmaceuticals Ltd, and Purecare Ltd (Zen Healthcare) which he is the co-founder and current managing director. Zen Healthcare now comprises several clinics and pharmacies in the UK. He also co-founded Pasithea Therapeutics Corp. and is currently Head of UK Clinics. He holds a number of scientific publications in peer-reviewed literature the anticancer research industry. Dr. Bendiabdallah has also attended and presented at several seminars and conferences globally. His current clinical expertise includes age reversal therapies, functional approaches to medicines and intravenous micronutrient therapies.

Simon Dumesnil


Simon Dumesnil has served on our board of directors since April 2021. He is currently a Managing Partner and Director of Dunraven Capital Partners Limited, an investment management advisory company incorporated in the UK whose investments are predominately in Eastern European corporate distressed credits and structured products. From 2013 to 2018, Mr. Dumesnil was Managing Director and Head of Structured Financing Group Americas of UBS Securities LLC, where he was responsible for the structured financing trading book in the USA and LATAM and managed a book of financing positions across fixed income products (corporate syndicated and middle-market loans, corporate bonds, real estate loans, CMBS/RMBS/CLO/ABS, LATAM Sovereign). From 2010 to 2013, he was Managing Director and Co-Head Private-Side Structuring Group EMEA of UBS AG., where he was responsible for arranging structured solution transactions and acquisitions for FIG and Special Situation Group (SSG) and also co-headed the illiquid financing business. From 2009 to 2010, Mr. Dumesnil was the Chief Investment Officer Bluestone Capital Management and responsible for investments in distressed assets across Europe. From 2008 to 2009, Mr. Dumesnil was Director of Lehman Brother Holding Inc. and responsible for restructuring and unwinding Lehman Brothers Special Financing Inc. derivative book post-bankruptcy. From 2003 to 2008, Mr. Dumesnil was Director of Lehman Brothers International (Europe). Throughout his career at Dunraven Capital Management, UBS Securities, UBS AG, Bluestone Capital Management and Lehman Brothers, Mr. Dumesnil advised and underwritten corporate risk related to companies across industries or jurisdictions. He has an in-depth knowledge on corporate restructuring and capital structure optimization for companies across their business life cycle. His experience as Chief Investment Officer during the launch and growth phases of a financial services and technology company represents valuable insights for our Company. Mr. Dumesnil attended Cass Business School, where he received his Master of Science in Banking and International Finance and École des Hautes-Études-Commerciales HEC, where he received his Bachelor in Business and Administration, Finance.

Dr. Emer Leahy


Dr. Emer Leahy has served on our board of directors since June 2021. Dr. Leahy received her Ph.D. in neuropharmacology from University College Dublin, Ireland in 1990, and her MBA from Columbia University in 2000. She has been with PsychoGenics Inc., a preclinical CNS service company, since 1999 and is currently serving as its chief executive officer and is responsible for compensation recommendations companywide. Prior to her appointment as the chief executive officer, she was the vice president of business development. Dr. Leahy is also the chief executive officer of PGI Drug Discovery LLC, a company engaged in psychiatric drug discovery with five partnered clinical programs including one in Phase III. Additionally, Dr. Leahy is currently serving as a member of both the compensation committee and the audit committee of Bright Minds Biosciences, a biotech company. Dr. Leahy has more than 30 years of experience in drug discovery, clinical development and business development for pharmaceutical and biotechnology companies, including extensive knowledge of technology assessment, licensing, mergers and acquisitions, and strategic planning. She also holds an Adjunct Associate Professor of Neuroscience position at Mount Sinai School of Medicine. Dr. Leahy served on the Emerging Companies Section Governing Board for the board of directors of the Biotechnology Industry Organization, the Business Review Board for the Alzheimer’s Drug Discovery Foundation, and the Scientific Advisory Board of the International Rett Syndrome Foundation. She also currently serves on the board of directors of PsychoGenics Inc, the board of directors of Intensity Therapeutics, and the Board of Trustees of BIONJ. We believe that Dr. Leahy is qualified to serve on our board of directors due to her extensive pharmaceutical, biotechnology and business background.