Meet the team

The RZIM 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

Michael Ramsden

Michael Ramsden is the Regional Director of RZIM for Europe, the Middle East and Africa and has been part of RZIM since its foundation in Europe in 1997. Michael is also joint Director of the Oxford Centre for Christian Apologetics and Honorary Fellow at Wycliffe Hall, Oxford. Michael was brought up in the Middle East and later moved to England where he worked for the Lord Chancellor’s department investing funds. While doing research in Law and Economics at Sheffield University, he taught Moral Philosophy and lectured for the International Seminar for Jurisprudence and Human Rights in Strasbourg.
Read Michael’s full biography →

Amy Orr-Ewing

Amy Orr-Ewing

Amy Orr-Ewing is the Training Director of the RZIM 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.
Read Amy’s full biography →

Ravi Zacharias

Ravi Zacharias

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.
Read Ravi’s full biography →

“Alister McGrath

Alister McGrath

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.
Read Alister’s full biography →

John Lennox

John Lennox

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?, God and Stephen Hawking, Seven Days that Divide the World and Gunning for God. In the past six years, Professor Lennox has debated a number of the world’s leading atheists including Richard Dawkins, Christopher Hitchens and Peter Singer.
Read John’s full biography →

Vlad Criznic

Vlad Criznic

Vlad Criznic is the Director of RZIM, 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 in Oxford. Vlad is married to Dora; they live in Arad, Romania, leading the RZIM Romania, travelling through Romania and Eastern Europe in order to preach, teach and defend Christianity.
Read Vlad’s full biography →

Vince Vitale

Vince Vitale

Vince Vitale is Senior Tutor at the Oxford Centre for Christian Apologetics, Tutor in Philosophy and Mission at Wycliffe Hall, a member of the Faculty of Theology and Religion at the University of Oxford, and a speaker for RZIM. He holds a Ph.D. in Philosophy and an M.Phil. in Theology, both from the University of Oxford. He has also taught at Princeton University in the Philosophy and Religion Departments. His primary research interests are in philosophy of religion, epistemology, and ethics.
Read Vince’s full biography →

Tom Price

Tom Price

Tom Price is an Academic Tutor at the Oxford Centre for Christian Apologetics, a speaker for RZIM, 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.
Read Tom’s full biography →

Sharon Dirckx

Sharon Dirckx

Sharon Dirckx is an Academic Tutor at the Oxford Centre for Christian Apologetics. Originally from a scientific background she has a Ph.D. in brain imaging from the University of Cambridge and has held research positions in the USA and the University of Oxford, UK. During its founding year in 2004/5, Sharon graduated from the Oxford Centre for Christian Apologetics. She has since been invited to speak and lecture in a variety of contexts and has also appeared on BBC Songs of Praise, Premier Christian Radio and BBC Radio 2 Good Morning Sunday with Clare Balding. Her topics of interest include the interface between science and faith, and suffering.
Read Sharon’s full biography →

Frog Orr-Ewing

Frog Orr-Ewing

Frog Orr-Ewing is 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 children’s 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.
Read Frog’s full biography →

Michelle Tepper

Michelle Tepper

Michelle Tepper is an itinerant speaker for RZIM Europe and a guest lecturer at the Oxford Centre for Christian Apologetics. She is an extremely gifted communicator and Christian apologist engaging on a variety of faith issues in various forums around the UK and Europe, as well as addressing audiences across Canada and North America. Born and raised in Florida, USA, Michelle went to Oxford University to complete her degree in Political Science at New College, where she met her husband Peter, an ordained minister.
Read Michelle’s full biography →

Tanya Walker

Tanya Walker

Tanya Walker is an Apologist for RZIM and a guest lecturer at the Oxford Centre for Christian Apologetics.  Her undergraduate degree was in Politics, Philosophy and Economics from Christ Church, Oxford University, and she holds an MA in Islamic Studies and a PhD which considers the implications of Islamic law in the West (both from the School of Oriental and African Studies, University of London). Tanya co-leads the Evangelists Network for the European Leadership Forum, and the RZIM Europe training weekends.
Read Tanya’s full biography →

Christian Hofreiter

Christian Hofreiter

Christian Hofreiter is RZIM Director for Germany, Austria and Switzerland, and a Research Fellow at the Oxford Centre for Christian Apologetics (OCCA). A native of Austria, he has studied, lived and worked in Innsbruck, Brussels, London, Los Angeles, Washington, DC and Oxford, and is now based in Vienna, Austria.
Read Christian’s full biography →

Andy Wickham

Andy Wickham

Andy Wickham is the director of RZIM Spain. He studied Theology at Schloss Mittersill, Austria, graduated from the Oxford Centre for Christian Apologetics in 2008, and earned his MTh in Old Testament Theology on the book of Malachi through UNISA. He has served across Spain discipling university students, debating skeptics, guiding evangelistic initiatives, addressing audiences on faith and apologetics, and training Christians to engage with skeptics. He has recently started Proclama, an initiative to raise a generation of passionate university evangelists who are equipped to proclaim the gospel in the Spanish academic context.
Read Andy’s full biography →

Mahlatse Winston Mashua

Mahlatse Winston Mashua

Mahlatse Winston Mashua is the Director of RZIM Zacharias Trust in South Africa. He grew up in Bushbuckridge, in the Mpumalanga Province, within a household that practiced Ancestralism (a traditional African religion). He came to know Jesus early in his life when he had a miraculous encounter during a visit to his village by itinerant missionaries. He went on to study biochemistry at the University of KwaZulu Natal, and, more recently, apologetics at the Oxford Centre for Christian Apologetics. He served as a pastor for a church in Durban for seven years where he was also involved with training the congregation in evangelism and discipleship. He regularly speaks evangelistically in many different contexts including rural villages, townships, and university campuses. Mahlatse is married to Lusanda and they live in Durban.
Read Mahlatse’s full biography →