Lester Ruth (PhD, University of Notre Dame) is research professor of Christian worship at Duke Divinity School in Durham, North Carolina. He is a historian of Christian worship with a particular interest in the history of Contemporary Praise & Worship.

Lim Swee Hong (PhD, Drew University) is Deer Park Associate Professor of Sacred Music at Emmanuel College of Victoria University, University of Toronto, in Toronto, Ontario. He has taught in the United States, Canada, and in his native Singapore and often leads global seminars and conferences dealing with worship and sacred music.