Fiona Hamilton Marshall FRS FMedSci is a British pharmacologist, founder and Senior Vice President of Discovery, Preclinical & Translational Medicine at Merck & Co. She will become the next president of the Novartis Institutes for BioMedical Research. She previously served as Chief Scientific Officer at Heptares Therapeutic, where she was Vice President of the Japanese biopharmaceutical company Sosei. She was elected Fellow of the Academy of Medical Sciences in 2016 and the Royal Society in 2021.