Dr. Paul Gill is a senior lecturer at University College London's Department of Security and Crime Science. Previous to this he was a postdoctoral research fellow at the International Center for the Study of Terrorism at Pennsylvania State University.

His research focuses upon terrorist behaviour. He has published over 40 papers in this domain. These topics cover lone-actor terrorism, threat management and risk assessment, radicalisation, role profiles, Irish Republican terrorism, the impact of counter-terrorism, social network analysis and psychopathological explanations of terrorist involvement. Routledge published his recent book on lone-actor terrorism. His work is largely interdisciplinary, evidenced by publications in leading psychology, criminology, political science, mathematics and general science journals.

His research has been funded by the Department of Homeland Security, the National Institute of Justice, the European Union, the MINERVA programme, the Office of Naval Research, START, the Defence Science and Technology Laboratory, and the Centre for Research and Evidence on Security Threats.

His research has been featured in several leading news outlets including Wired, the Washington Post, the New York Daily News, The New York Times, the Globe & Mail, The Guardian, The Telegraph and the Irish Independent.