Collins is Professor of Historical Theology and Wesley Studies, Director of the Wesleyan Studies Summer Seminar, and Director of the Wesleyan Holiness Pentecostal Studies Center, Asbury Theological Seminary. Among his publications are The Sermons of John Wesley: A Collection for the Christian Journey (coedited with Jason E. Vickers; Abingdon, 2013) and Doctrinal and Controversial Treatises Ii, vol. 13 of The Works of John Wesley (coedited with Paul Wesley Chilcote; Abingdon, 2013).