David Platt currently serves as the pastor of The Church at Brook Hills in Birmingham, AL. David has also served as Dean of Chapel and Assistant Professor of Expository Preaching and Apologetics at New Orleans Baptist Theological Seminary and Staff Evangelist at Edgewater Baptist Church in New Orleans.

He holds a B.A. and B.A.J. from the University of Georgia, and an M.Div., Th.M., and Ph.D. from New Orleans Baptist Theological Seminary.

David has also authored two books. In 2010, he released his first book, Radical: Taking Back Your Faith from the American Dream. In April of 2011, he released the sequel, Radical Together: Unleashing the People of God for the Purpose of God.

David and his wife Heather have two sons, Joshua and Caleb.

Michael Ramsden has been the European Director of RZIM Zacharias Trust since its foundation in 1997. He grew up in the Middle East, returning to the UK to work investing money for the Lord Chancellor’s Department and to study. While at Sheffield University doing research in Law and Economics, he taught Moral Philosophy and lectured for the International Seminar on Jurisprudence and Human Rights in Strasbourg.

Michael is a passionate evangelist and apologist for RZIM Zacharias Trust, and is also Lecturer in Christian Apologetics at Wycliffe Hall, Oxford University, where his main involvement is with the Oxford Centre for Christian Apologetics. Michael travels widely speaking in universities, churches, and at conferences.

Michael Oh is president and founder of CBI Japan which includes a graduate-level theological seminary (Christ Bible Seminary), church planting efforts (All Nations Fellowship), and various outreach ministries including a planned youth outreach called the Heart & Soul Cafe.  Michael received his Ph.D. in Educational Leadership and Anthropology at the University of Pennsylvania where he also did his undergraduate degree and a master's degree.  His theological training was received at Trinity Evangelical Divinity School, and he also completed a master's degree in Japanese Studies at Harvard University.  Michael spoke at Urbana 2009 and the 2009 Desiring God Pastor's Conference.  Michael has served on the Board of the Lausanne Movement since 2007.  He and his wife Pearl have 5 children.

Ed Stetzer currently serves as the Vice President of Research and Ministry Development for Lifeway Christian Resources. Ed has planted churches in New York, Pennsylvania, and Georgia. He has trained church planters on five continents and he has written many articles and books. Among those books are: Planting New Churches in a Postmodern Age, Strategic Outreach (with Eric Ramsey), Breaking the Missional Code (with David Putman), and Planting Missional Churches. Ed holds two masters degrees and two doctorate degrees. He is Visiting Professor of Research and Missiology at Trinity Evangelical Divinity School, Visiting Research Professor at Southeastern Baptist Theological Seminary, and has taught at fifteen other colleges and seminaries.

He and his wife Donna have three daughters and call Tennessee home.

Greg Livingstone has been instrumentally involved with Operation Mobilization, Arab World Ministries, World Outreach (Evangelical Presbyterian Church) and Frontiers. He has given over 40 years of his life to the work of world missions in India, the Arab World, Europe, and Malaysia.

Greg earned his D.Miss. from Biola University. He met his wife Sally at Wheaton College. The Livingstones have three sons—born in India, Germany, and Lebanon—and six grandchildren.

John Piper is Pastor for Preaching and Vision at Bethlehem Baptist Church in Minneapolis, Minnesota. He grew up in Greenville, South Carolina and studied at Wheaton College, where he first sensed God’s call to enter the ministry. He went on to earn degrees from Fuller Theological Seminary (B.D.) and the University of Munich (D.Theol.). For six years he taught Biblical Studies at Bethel College in Saint Paul, Minnesota and in 1980 accepted the call to serve as pastor of Bethlehem Baptist Church.

He has written, among other books, Desiring God, Don’t Waste Your Life, God Is the Gospel, What Jesus Demands from the World, and Think: The Life of the Mind and the Love of God. He is married to Noël and has four sons and one daughter.

David and his wife Tommi founded To Every Tribe Ministries where he currently serves as president. They also founded The Center for Pioneer Church Planting, which began in January 2006.

David is a career church planting missionary who lived and worked in Papua New Guinea for 16 years. He made the first gospel contact with several cannibalistic and head hunting tribes in the interior of New Guinea, and since then 33 churches have been established among such tribes.

David and Tommi have three grown children and two beautiful grandchildren.

Jason was born in Winnipeg, Canada and grew up and studied there, gaining a Masters in Global Christian Studies at Providence Theological Seminary. He has lived in England for 15 years, working on the past two editions of Operation World, initially as co-author with Patrick Johnstone and now as author.

The Operation World team has for decades served the global church by researching the salient and strategic issues in each country, and communicating these through statistical information and prayer guides. Jason's own interests directly related to this include the demographics of religious and ethnic populations, the challenges of communicating the gospel cross-culturally, theologies of prayer and ethno doxology.

Dave Harvey is a member of Sovereign Grace Ministries' leadership team, serving churches in the northeastern United States, overseeing the ministry's missiology and church-planting strategies, and directing Sovereign Grace's involvement in Europe, Africa, and parts of Asia.

Dave received his Doctor of Ministry degree in Pastoral Care from Westminster Theological Seminary in 2001. He has authored three booklets in the Sovereign Grace Perspectives series, contributed to the book entitled Why Small Groups?, and has authored the book When Sinners Say “I Do”: Discovering the Power of the Gospel for Marriage and Rescuing Ambition.

Dave and his wife Kimm live in West Chester, Pennsylvania with their four children.