Prometheus Biosciences Inc. announced the appointment of Thierry Dervieux, PharmD, PhD, DABCC as chief development officer, diagnostics, and medical laboratory director. Dr. Dervieux joins Prometheus Biosciences from Exagen Diagnostics, a diagnostic company focused on chronic autoimmune diseases, where he served as chief scientific officer and medical director. Prior to joining Exagen, Dr. Dervieux was vice president of research and development at Cypress Bioscience Inc. and senior director of research and development with Proprius Pharmaceuticals Inc. (acquired by Cypress Bioscience Inc.). Prior to that, he served as principal scientist and director of research and development at Prometheus Laboratories. Dr. Dervieux is board certified by the American Board of Clinical Chemistry and holds certificates of qualification as medical laboratory director in the categories of cellular immunology, clinical chemistry, drug monitoring, genetic testing, and diagnostic immunology.