John D. Witvliet is the director of the Calvin Institute of Christian Worship and a professor of congregational and ministry studies, music, and worship at Calvin College and Calvin Theological Seminary. His responsibilities include oversight of the Institute's practical and scholarly programs, and teaching courses at both the college and seminary.

His areas of interest include the history of Christian worship, worship practices in various denominations, biblical and systematic theology of worship, the role of music and the arts in worship, choral music, and consulting with churches on worship renewal.

His writings include scholarly works on the history and theology of worship; anthologies of liturgical texts and congregational songs; children's books on the meaning and purpose of worship, including his latest bilingual children's picture book titled En la escula de los Salmos/At Psalms School; and books of practical wisdom for pastors, church musicians and artists, and other worship leaders.

A graduate of Calvin College, Dr. Witvliet holds graduate degrees in theology from Calvin Theological Seminary, in choral music from the University of Illinois, and a Ph.D. in liturgical studies and theology from the University of Notre Dame. He is a frequent lecturer at conferences on worship and has published over 70 articles on worship-related topics, with particular interest in the doctrine of the Trinity; liturgical enculturation; liturgical aesthetics; worship and culture; worship practices of the fourth, sixteenth, and twentieth centuries; and new and emerging patterns of worship worldwide. He has received awards for this work from the Hampton Ministers Conference, the National Association of Pastoral Musicians, and Calvin College.