Team Biographies

Michael Ramsden

Michael Ramsden is President of RZIM and one of the founders of OCCA The Oxford Centre for Christian Apologetics. He spent most of his childhood in the Middle East and later moved to the UK, where he worked for the Lord Chancellor’s Department investing funds. Michael went on to teach jurisprudence at the University of Sheffield, whilst doing research in law and economics.

His passion is to engage with people of all backgrounds and cultures about questions of faith, which he has been doing for over twenty years. He speaks in business, academic, political, and other settings around the globe, ranging from Europe and the Middle East, to Asia and the Americas. Michael helps oversee the international team of RZIM speakers based in sixteen offices worldwide. He and his wife, Anne, have three children and are based in Atlanta.

Dr Amy Orr-Ewing

Dr. Amy Orr-Ewing is President of OCCA The Oxford Centre for Christian Apologetics, and a Senior Vice President with RZIM. She leads a team of pioneering apologist-evangelists and speaks around the world on how the Christian faith answers the deepest questions of life.

Over the last twenty years, Amy has spoken on university campuses, including Oxford, Cambridge, Vienna, Hong Kong, Phoenix, Massachusetts, in the Speakers Rooms and Chapel at the UK Parliament, on Capitol Hill, and to West Wing staff at the White House. She also speaks in banks, businesses, and consultancy firms as well as churches and conferences.

Amy gained a first-class degree in Theology and a DPhil (doctorate) from the University of Oxford. She is also the co-founder of REBOOT, a youth apologetics initiative aimed at helping young people think deeply about faith, which now runs in countries all over the world.

Amy is married to Frog and helps lead Latimer Minster, a church plant and community on a farm in Buckinghamshire, and they have three children.

Areas of interest:  the nature of truth, identity, rational defence of Christianity, historicity of the Bible, New Testament history, ethical dilemmas, tolerance, evil, suffering, friendship, human trafficking.

Amy has made various appearances on national television in the UK  including appearances on BBC  Television (Blue Peter and Songs of Praise) and television networks in the USA. She is increasingly called upon to comment on a variety of topics relating to the Christian faith on radio interviews both across the UK and worldwide.  She has contributed to various discussions including the BBC Radio 4’s Beyond Belief.

Dr Tanya Walker

Tanya Walker is Director of OCCA The Oxford Centre for Christian Apologetics, and Director of Speakers for RZIM Zacharias Trust.

She holds a PhD in Politics and International Studies from SOAS (University of London) where her thesis focused on notions of freedom, power, and the complexities at the interface of competing rights within a liberal framework. Tanya also has an MA in Islamic Societies and Cultures from SOAS and an undergraduate degree in Politics, Philosophy, and Economics from Christ Church, Oxford University. Prior to undertaking her postgraduate research, Tanya worked in the political sphere in various public policy and communication roles.

Born in the Middle East, and from Armenian descent, Tanya grew up against the formative backdrop of a persecuted church. Her passion is to connect with people from all walks of life in exploring the ultimate questions of life and meaning. Specifically, the mysterious claim of the Gospel that the Christian narrative not only provides a compelling framework through which to make sense of our world and our experiences, but is the context through which we can encounter God.

Tanya speaks internationally in academic, business, and political contexts, as well as Christian gatherings, alongside raising outstanding Christian thinkers and communicators through the OCCA programme. Tanya is married to Toby and they are based in Oxford with their three young children.

Dr Sharon Dirckx

Dr Sharon Dirckx is a Senior Tutor at OCCA The Oxford Centre for Christian Apologetics and an RZIM Apologist. Originally from a scientific background, she has a Ph.D. in brain imaging from the University of Cambridge and has held research positions at the University of Oxford, UK and the Medical College of Wisconsin, USA.

Sharon is an OCCA Alumna, and completed the OCCA programme in 2005 during its founding year. She is invited to speak and lecture in a variety of contexts across the UK, including the 2014 Veritas Forum at the University of Oxford.

Sharon has also appeared on BBC Songs of Praise, Justin Brierley’s programme, Unbelievable, on Premier Christian Radio, BBC Radio 2 Good Morning Sunday with Clare Balding and BBC Radio 4 Beyond Belief. Her topics of interest focus on the interaction of belief in God with Science, and with the problem of evil and suffering.  Her book, Why?: Looking at God, Evil and Personal Suffering, won the prize for best book at the 2014 Speaking Volumes UK Christian Book Awards (presented by Pam Rhodes). Why? interweaves the stories of people who have suffered, with a practical look at some ‘Why?’ questions on suffering.

Sharon lives in Oxford with her husband and two young children.

Tom Price

Tom Price is an Academic Tutor at OCCA The Oxford Centre for Christian Apologetics and an apologist for RZIM. He studied Philosophy at university and later completed an MA in Christian Apologetics, and is currently undertaking doctoral research in theology, philosophy and film.

In recent years Tom has spoken to a variety of audiences in Hong Kong, Europe, South Africa, USA and other places across the world. In the UK, he has provided teaching for major conferences such as New Wine, Keswick, The Stewards Trust and Spring Harvest and organisations including; the Baptist Union, HTB: School of Theology, 24/7 prayer, UCCF, Scripture Union and L’Abri. Tom has also undertaken a variety of media work, appearing on BBC1 Songs of Praise, the BBC World Service, Local BBC radio and Premier Christian Radio’s ‘Unbelievable?’ show.

He was previously the Founding Editor of UCCF’s website, and more recently he has created (a worldview survey and analysis system) and (a film discussion initiative).  Tom has many years of expertise and experience in mission, apologetics, theology and discipleship. He is passionate about philosophy and theology that fundamentally takes people seriously, values the individual and engages with the serious questions and objections they may have about life and religious beliefs. Tom is married to Caroline, has three smallish children, and they live in Oxford.


Simon Edwards

Simon Edwards is the Lead Missioner for OCCA The Oxford Centre for Christian Apologetics. He holds separate degrees in law and economics from the University of Queensland, Australia, as well as graduate diplomas in legal studies and education. Simon also has a postgraduate diploma in theology from the University of Oxford and is currently studying for a master’s degree in divinity at the University of St Andrews. He brings with him a diverse range of Christian ministry, legal, government, and teaching experience. Prior to joining RZIM, Simon lived and worked in Australia as a lawyer, specialising in private practice in commercial law and in government practice in constitutional law. He also worked for two years in a secondary school as a religious education teacher.

Simon is a regular speaker in many different settings, including at evangelistic and apologetic training events in universities, schools, churches, and workplaces both in the UK and abroad. He has also been invited to speak on a number of BBC Radio programs regarding the evidence for the Christian faith, particularly from his perspective as a lawyer. Simon’s areas of interest include moral apologetics, human dignity, faith and reason, the nature of truth, evidence for the resurrection, suffering, and ethics. Simon is married to Natasha, who is part of the leadership team at Latimer Minster, a missional Church of England church situated between London and Oxford. Simon and Natasha live in High Wycombe with their three young children, Grace, Jonathan, and Joseph.