Meet the team
RZIM Zacharias Trust itinerant speaking team is complemented by our lecturers and tutors at the Oxford Centre for Christian Apologetics (OCCA), all of whom act as additional speaking resources for the trust, wherever possible. This combined team comprise some of the leading Christian thinkers of our time, with more than 150 years’ speaking and preaching experience between them. With additional support from the global team of itinerant speakers, the trust has a wealth of evangelist-apologists to call upon. Because the demand for our unique ministry continues to grow, we have also begun to develop a team of associate speakers throughout Europe.
The following list represents our main speaking team:
-
Michael Ramsden
European Director
Michael Ramsden has been European Director of RZIM Zacharias Trust since its foundation in 1997. He is also Director of the Oxford Centre for Christian Apologetics and Lecturer in Christian Apologetics at Wycliffe Hall, Oxford. While at Sheffield University doing research in Law and Economics, Michael taught Moral Philosophy and lectured for the International Seminar on Jurisprudence and Human Rights in Strasbourg. He has been invited to lecture to a variety of groups including the White House staff in Washington, D.C., leaders at NATO HQ in Brussels and Members of the European Parliament.
-
Amy Orr-Ewing
UK Director
Amy Orr-Ewing is the Training Director of the RZIM Zacharias Trust and Director of Programmes for the Oxford Centre for Christian Apologetics. She speaks at many universities, churches, and conferences. Her book Why Trust the Bible? (published as Is the Bible Intolerant? in North America) was shortlisted for the 2006 UK Christian Book Awards, and But Is It Real? (published as Is Believing in God Irrational? in North America) was released in the summer of 2008.
-
Ravi Zacharias
Founder, Chairman and CEO of Ravi Zacharias International Ministries
Ravi Zacharias is the Founder, Chairman and CEO of RZIM. He has spoken in over 50 countries and in many universities, such as Harvard, Princeton, and Oxford. He has addressed writers of the peace accord in South Africa, the presidential cabinet and parliament in Peru, and officers at the Lenin Military Academy in Moscow. Ravi has also spoken at the National Day of Prayer in Washington, D.C., the Pentagon, and twice at the United Nations Annual Prayer Breakfast. He has written numerous books, including the Gold Medallion winner, Can Man Live Without God. His weekly radio program, Let My People Think, is aired on almost 1700 outlets worldwide.
-
Alister McGrath
President of the Oxford Centre for Christian Apologetics
Alister McGrath is Professor of Theology, Ministry, and Education at King’s College, London, Senior Research Fellow at Harris Manchester College, Oxford, and President of the Oxford Centre for Christian Apologetics. He travels extensively to speak at conferences and missions. His writings include his acclaimed book on apologetics, Bridge Building, his widely popular Christian Theology: An Introduction and various titles on science and religion, such as A Fine Tuned Universe and The Open Secret: A New Vision for Natural Theology. He has also written a number of titles on atheism including Dawkins’ God, The Dawkins Delusion? and The Twilight of Atheism.
-
John Lennox
Adjunct Professor at the Oxford Centre for Christian Apologetics
John Lennox is Professor of Mathematics at Oxford University, and Adjunct Professor at the Oxford Centre for Christian Apologetics. He is also a Fellow in Mathematics and Philosophy of Science at Green Templeton College, Oxford. Interested in the interface of science, philosophy, and theology, he lectures worldwide and has written books on Christian apologetics, including God’s Undertaker, Has Science Buried God? and Christianity: Opium or Truth? (the latter co-authored with David Gooding). In the past two years, Professor Lennox has debated a number of the world’s leading atheists including Richard Dawkins and Christopher Hitchens.
-
Vlad Criznic
Director, RZIM Zacharias Trust Romania
Vlad Criznic is the Director of RZIM Zacharias Trust, Romania. He grew up in a non-Christian family in the western part of Romania and became a Christian when he was 16. Ever since, he was involved with various ministries in doing evangelistic camps and events for the youth ministries of Romanian Evangelical Churches. Among them is Josiah Venture and the Romanian Missionary Society. Graduating in 2008 from the Emanuel University of Oradea with a B.A. in Pastoral Theology, following apologetics training while being an Associate of the RZIM Zacharias Trust in Oxford. Vlad is married to Dora; they live in Arad, Romania, leading the RZIM Zacharias Trust Romania, travelling through Romania and Eastern Europe in order to preach, teach and defend Christianity.
-
Vince Vitale
Senior Academic Tutor in Evangelism & Apologetics
Vince Vitale is Tutor in Apologetics at Wycliffe Hall (a Permanent Private Hall of the University of Oxford) and Senior Academic Tutor at the Oxford Centre for Christian Apologetics. He is finishing an Oxford doctorate in Philosophy, having first completed an M.Phil. in Theology. His primary research interests are in ethics, epistemology, and philosophy of religion, areas which converge in his doctoral thesis on The Problem of Evil. Vince is an Associate Editor of Forum Philosophicum: International Journal for Philosophy, erstwhile Secretary of the Joseph Butler Society for the Philosophy of Religion, and a speaker for the Zacharias Trust. Previously, he taught with rank of Lecturer in the Philosophy and Religion Departments of his alma mater, Princeton University, where he committed his life to Jesus Christ as an undergraduate and later served as Director of Athletes in Action Christian Fellowship.
-
Tom Price
Academic Tutor at the Oxford Centre for Christian Apologetics
Tom Price is an Academic Tutor at the Oxford Centre for Christian Apologetics, an Associate of RZIM Zacharias Trust, and an independent itinerant evangelist/apologist. He studied Philosophy at university and later completed an MA in Christian Apologetics. Before studying for his Masters, Tom worked for the University and Colleges Christian Fellowship as the founding editor of their apologetics website (www.bethinking.org). Currently, as well as his work with the OCCA, Tom is also involved with Damaris – an educational charity that seeks to help people across the world explore spiritual and moral issues underlying their contemporary culture.
-
Sharon Dirckx
Academic Tutor at the Oxford Centre for Christian Apologetics
Sharon is a scientist with a PhD in brain imaging from Cambridge University who has spent time working in industry in Switzerland and academia in the UK and USA. She graduated from the Oxford Centre for Christian Apologetics in 2005 where she completed the One-Year Certificate. Until recently her time was divided between scientific research in functional MRI of the human brain, and evangelism and apologetics ministry in a variety of different settings including schools, universities and prison. Her passion is to unashamedly communicate the gospel in a culturally relevant way and to mentor and train others to do the same.
-
Frog Orr-Ewing
Chaplain and Missioner at the Oxford Centre for Christian Apologetics
Frog became the youngest incumbent in the country as vicar of All Saints church in Peckham after a curacy at St Aldates Church in Oxford. Despite Peckham’s many challenges, over seven years the congregation witnessed marked growth and breakthroughs in community engagement and mission, and now numbers several hundred with youth and childrens activities to about 1000 children in the local area. Frog and Amy were sent with the Blessing of the Peckham congregation on Pentecost in May 2010 to plant Latimer Minster.
-
Michelle Tepper
Evangelist and apologist for RZIM Europe/h3>
Michelle joined in September 2011 but has been known to the ministry for many years: she was part of the first graduating class from the one-year programme of the Oxford Centre for Christian Apologetics in 2005. Following this, she spent six years as a full-time Student Pastor at St. Aldate’s, a thriving student church located in the heart of Oxford. Michelle was a student herself at Oxford University, completing a BA in Political Science at New College.
She is a gifted communicator, and engages on a variety of faith issues in numerous forums around the UK, as well as being in demand across Canada and North America.
She lives in Oxford with her husband Peter, an ordained minister, and daughter Sophia.















