I was born in London but raised in Zimbabwe, completing my higher education and first theological appointments in South Africa. I was a minister, principal of Tshwane Theological College near Pretoria and part-time researcher at the University of South Africa before joining Selly Oak Colleges as Director of the Centre for New Religious Movements in 1995, becoming an honorary lecturer and, from 1999, a lecturer at the University of Birmingham.
I was awarded a Chair in 2005. My main interests are in the areas of the history, mission and theology of Pentecostalism in Africa and Asia. I am the author of four books on South African Pentecostalism, one on African independent churches, and three books on global Pentecostalism that have received international acclaim. My Introduction to Pentecostalism has been translated and published in Spanish and is being translated into three other languages, and now has a second edition.
I am also the author of many articles, and have joint-edited three collections on Pentecostalism. I am editor of the peer-reviewed journal published at Euinox, PentecoStudies. I am a founder-member of the European Research Network on Global Pentecostalism which conducts research in four European universities, and I also serve on the interational editorial board of four academic journals. I am an internationally well-known scholar in my field.