 In 2002, he moved to the University of Oxford, where he was head of the Division of Mathematical and Physical Sciences and professorial fellow of St John's College.Clary was elected a Fellow of the Royal Society for his development of the quantum theory for chemical reactions.He is a Fellow of the American Association for the Advancement of Science, the American Physical Society, the Royal Society of Chemistry (RSC) and the Institute of Physics; Foreign Honorary Member of the American Academy of Arts and Sciences and a member of the International Academy of Quantum Molecular Science.