Dr. Cahill studied Biology at University College Dublin, Ireland graduating in 1985 with her Batchelors degree. She received her PhD degree in 1990 at the same institution. After a 3 year postdoctoral fellowship at the Babraham Research Institute, Cambridge UK, she came to the U.S. where she carried out research at the Dana Farber Cancer Institute and several other Harvard affiliated hospitals including Massachusetts General Hospital. She is an Assistant Professor of Psychiatry at Massachusetts General Hospital and Co-Directs the Neurochemistry lab with her colleague Dr. Jack Rogers. She has published widely in topics such as cancer and inflammation, diabetes, neurodegenerative diseases and now alcohol use disorder, bringing to the field her interdisciplinary background and new perspectives to this research area.