He previously served as an assistant research professor in the Hugh Downs School of Human Communication at Arizona State University. Halverson is the author of Theology and Creed in Sunni Islam (Palgrave Macmillan 2010), Searching for a King: Muslim Nonviolence and the Future of Islam (Potomac, 2012), and the lead author of Master Narratives of Islamist Extremism (Palgrave Macmillan 2011) and Islamists of the Maghreb (Routledge 2017). His scholarship has also been published in several academic journals, including The Muslim World and The Journal of Communication.