Bowen is professor of nonproliferation and international security and the director of the Centre for Science and Security Studies in the Department of War Studies at King's College in London. His expertise is in nonproliferation, terrorism, and US security policy. From 1997 to 1998, he served as a weapons inspector on several missile teams in Iraq with the UN Special Commission; he has also worked as a consultant to the International Atomic Energy Agency. More recently, he was a specialist adviser to the House of Commons' Foreign Affairs Committee for inquiries into Britain's decision to enter the Iraq War. He has researched and written widely on proliferation-related issues, including the Libyan nuclear program, the G8 Global Partnership, and US missile non-proliferation policy.