A. Richard Bullock is an associate clergy member at St. Michael & All Angels Episcopal Church in Portland, Ore., and co-author of Clergy Renewal: The Alban Guide to Sabbatical Planning.

The Rev. G. Lloyd Rediger of Albuquerque, N.M., is an author, speaker and trainer and is ordained in the Presbyterian Church (U.S.A.). His books include Coping With Clergy Burnout and Clergy Killers: Guidance for Pastors and Congregations Under Attack.

H.B. London Jr. is vice president of ministry outreach/pastoral ministries at Focus on the Family in Colorado Springs, Colo., and co-author of Pastors at Greater Risk: Real Help for Pastors From Pastors Who’ve Been There. London is also a fourth-generation minister.

Kent Ira Groff is founding mentor at Oasis Ministries and the author of Clergy Table Talk (2012), in which he discusses physical, spiritual and emotional burnout among clergy. His home office is in Denver.

Charles W. Mueller is a professor emeritus of sociology at the University of Iowa, Iowa City. He has written about clergy-congregation mismatches and clergy job satisfaction.

The Rev. Donald B. Cozzens is writer-in-residence in the religious studies department at John Carroll University, University Heights, Ohio. His books include The Changing Face of the Priesthood: A Reflection on the Priest’s Crisis of Soul.

James N. Gregory is a history professor at the University of Washington and director of the Seattle Civil Rights and Labor History Project. Among books he has written is The Southern Diaspora: How the Great Migrations of Black and White Southerners Transformed America (The University of North Carolina Press, 2006).

Charlyn M. Singleton is president of God’s Woman Conferences, based in Rialto, Calif. She is a motivational and revival speaker, working with youth, women and men at conferences, marriage events, retreats, workshops and worship services.

Cecil Williams has been the pastor of the 7,000-member Glide Memorial United Methodist Church, in San Francisco’s gritty Tenderloin district since 1963. He is a spiritual, political and social force in the Bay Area, and the church is a leading voice in promoting diversity of all sorts, social activism and community programs.