 From 1992 to 1997, he was Lecturer in American History at the University of Birmingham, and from 1997 to 2005, chair in American Studies and Director of the Centre for American Studies at the University of Leicester.Cull's research and teaching interests are broad and inter-disciplinary, and focus on public diplomacy, the role of advocacy, culture, exchange, broadcasting, and public opinion research in foreign policy.Cull has also worked more broadly on the history of propaganda, film, television and radio history and the role of mass media as a source for historical study.