 He is the editor of Brill's "Companions to Modern Theology" series and co-editor of the Edinburgh University Press "Critical History of Theology" series.He is also on the editorial board of "The Journal of Scriptural Reasoning" (University of Virginia) and a consulting editor for the "Encountering Traditions" series published by Stanford University.Greggs is a local preacher in the Methodist Church and has also preached internationally as well as appearing on radio.