Per Magnus Ranstorp is a Swedish scholar who has written about Hezbollah, Hamas, Al-Qaeda and other militant Islamic movements. He is the Research Director of the Centre for Asymmetric Threat Studies at the Swedish National Defence College, directing a project on Strategic Terrorist Threats to Europe which focuses on radicalisation and recruitment of salafist-jihadist terrorists across Europe and the convergence between Chemical, Biological, Radioactive and Nuclear Weapons, and Terrorism. Ranstorp graduated from Gustavus Adolphus College in Saint Peter, Minnesota in 1985.

Evan F. Kohlmann is an American terrorism consultant who has worked for the FBI and other governmental organizations.