Paul is a member of the WHO Technical Advisory Group for leprosy and Buruli ulcer and since 2000 he has been Medical Director of American Leprosy Missions. A central component of his work with ALM has been to coordinate an advisory team on the development of a new leprosy vaccine. He is also editor of the Leprosy Review, the only international scientific journal devoted specifically to leprosy research. Paul has worked in the field of leprosy since 1981. He started his career at a mission hospital in western Uganda. In 1994 he was appointed Director of ALERT’s Leprosy Control Division.