Jim Johnston currently serves as the Head of Gastroenterology and Inflammation Drug Discovery Unit at Takeda since November 2023. In addition, Jim Johnston has been the Chief Scientific Officer and Interim CEO at Kalthera LLC since October 2019 and Chief Scientific Officer at IMMPACT BIO USA INC from July 2021 to September 2024. Previous roles include Vice President of Research at A2 Biotherapeutics, Inc., and Executive Director of Inflammation Research at Amgen. Jim Johnston has also held academic positions as a Professor of Immunology at Queens University Belfast and Chief Scientific Officer at Fusion Antibodies Ltd, along with working as a Principal Scientist at DNAX Research Institute. Jim Johnston obtained a PhD in Biochemistry from The University of Manchester, completing this degree in 1991.