 After three years of working with leading American physicians that included George Minot and William Bosworth Castle he achieved his B.M., B.Ch in 1935.During the Second World War he began working for the Rockefeller Institute and became nutrition adviser to United Nations Relief and Rehabilitation Administration (UNRRA).In 1946 he was appointed senior lecturer in nutrition at the University of Edinburgh, where he remained for 15 years and was known for his well-prepared entertaining lectures.