Greystone Fellows

Greystone is led by a team of accomplished and dedicated Fellows who research or teach at the top of their respective fields. All are full-time academics or full-time clergy who also work regularly in an academic context. All Fellows and Lecturers sign a Statement of Confessional Adherence before teaching any course.


Greystone Staff

Greystone is also run by a small team of administrators. Dr. Mark Garcia serves as Executive Director and President. Jessica Doerfel serves full-time as Senior Director of Administration and can be reached at with any and all questions related to Greystone. Jack Franicevich serves part-time as Communications Manager. For all web-related issues and inquiries, you can reach him at

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Dr. Mark A. Garcia

President/CEO | Fellow in Scripture and Theology | Director, Lydia Center for Women and Families

B.S. | Clearwater Christian College | 1998
M.A.R. | Westminster Theological Seminary | 2000
Postgraduate Study | Westminster Theological Seminary | 2001
Ph.D. | New College, University of Edinburgh | 2004

Greystone's founding President, Dr. Garcia, has been Visiting Scholar in the Faculty of History at Cambridge University and Senior Member of Wolfson College, Cambridge, and Honorary Research Fellow at the University of East Anglia. He is an adjunct professor in theology at several seminaries including Westminster Theological Seminary, Reformed Presbyterian Theological Seminary, and Trinity School for Ministry, and has been the pastor at Immanuel Orthodox Presbyterian Church in Coraopolis/Pittsburgh since 2007. He teaches and writes across the disciplines, and has taught in recent years on horrendous evils and the atonement, the theological virtues, theological anthropology, pre-Reformation theology, New Testament theology, and the nature of Scripture. He has enjoyed research fellowships and awards in Edinburgh, Geneva, and Grand Rapids, MI, and maintains an active research and teaching program. He was an assistant editor (theological) for the five-volume Minutes and Papers of the Westminster Assembly: 1643-1652 (Oxford University Press, 2012), edited by Chad Van Dixhoorn, and has served in a similar role for a project on the idea of independency in the early modern era. He is author of Life in Christ: Union with Christ and Twofold Grace in Calvin’s Theology (Paternoster, 2008) and many journal articles and essays, and is currently researching the theological ontology of the feminine in relation to the biblical divorce and household texts. He is Director of Greystone's Lydia Center for Women and Families and dedicates much of his labors to issues of gender, domestic violence, and the use and abuse of church power. In his free time, Dr. Garcia enjoys literature, music, sports, and wine – especially red “left bank” Bordeaux. He is a member of the Guild of Sommeliers, and occasionally studies for the Certified Specialist of Wine exam.


Dr. Atria Larson

Academic Dean/Vice President for Academic Affairs | Fellow in Medieval Church History and Canon Law

B.A. | Covenant College | 2003
M.A. | Catholic University of America | 2006
Ph.D. | Catholic University of America | 2010

Dr. Larson completed her dissertation in Munich in 2010 on a Fulbright grant. She is currently Visiting Scholar in the Center for Medieval and Renaissance Studies at Saint Louis University and co-editor of the Bio-bibliographical Guide to Medieval Jurists, an in-progress online database funded by the Ames Foundation (Harvard Law) in collaboration with Saint Louis University’s Center for Digital Humanities. She is co-editor of the Companion to the Medieval Papacy (Brill, 2016). Her first book, Master of Penance: Gratian and the Development of Penitential Thought and Law in the Twelfth Century (Washington DC: CUA Press, 2014), is winner of a 2015 Manfred Lautenschlaeger Award for Theological Promise from the University of Heidelberg. She has also edited and translated the subject of her monograph, Gratian’s Tractatus de penitentia; the publication is forthcoming from CUA Press. She and her family are members of Gateway Orthodox Presbyterian Church in St. Louis.


Mr. michael sacasas

Associate Fellow in Ethics and Culture

B.A. | Clearwater Christian College | 1999
M.A. | Reformed Theological Seminary | 2002
Ph.D. (ABD) | University of Central Florida | TBD

Mr. Sacasas earned his MA in Theological Studies from Reformed Theological Seminary in 2002. Over the years he has taken a special interest in the work of Hannah Arendt and the resources it offers to those seeking to understand the personal and social implications of emerging technologies. He has written about technology and society for a variety of outlets including The New Inquiry, Rhizomes, The American, Mere Orthodoxy, and Second Nature Journal. Since July 2019, Mr. Sacasas works with the Christian Studies Center of Gainesville.


Dr. Byron G. Curtis

Fellow in Old Testament

B.A. | Geneva College | 1976
M.Div. | Reformed Theological Seminary | 1980
Ph.D. | Westminster Theological Seminary | 2005

Dr. Curtis is a professional scholar, author, and teacher specializing in Hebrew Bible, with a research focus on ancient Judean prophetic and historical texts, the Persian period in Palestine (539–331 BCE), and the history of biblical interpretation. He serves as Professor of Biblical Studies at Geneva College in Beaver Falls, PA, where he has taught Hebrew language, Old Testament studies, and Christian theology for 24 years. In 2011, he was Adjunct Professor of Biblical Studies at Jerusalem University College, Mt. Zion, Israel. He is an ordained minister in the Presbyterian Church in America, and served on the pastoral staff of Peace Presbyterian Church (PCA), Cary, NC. He has lectured on four continents, and is frequently sought as a consultant, guest speaker, and teacher. He is the author of numerous articles and conference papers in Hebrew Bible, and of the book Up the Steep and Stony Road: The Book of Zechariah in Social Location Trajectory Analysis. Academia Biblica 25 (Atlanta: Society of Biblical Literature, 2006). He has studied at Westminster Theological Seminary (Ph.D., Duke University, Reformed Theological Seminary (M.Div.), Reformed Presbyterian Theological Seminary, and Geneva College (B.A.). He and his wife, Sue Ann, have two grown children, Nathan and Naomi, and a granddaughter, Psyche Ariel.


Dr. Mark jones

Fellow in Theology and History

B.A. (Honors) | Mount Allison University (Canada) | 2003
M.A. (Distinction) | Potchefstroom University (South Africa) | 2006
Ph.D. | Leiden University | 2009

Dr. Jones is Pastor of Faith Vancouver Church (PCA) in Vancouver, Canada and a specialist in post-Reformation Reformed theology. In addition to a variety of highly regarded general audience books in Christian theology, Jones edited (with Michael Haykin), A New Divinity: Transatlantic Reformed Evangelical Debates during the Long Eighteenth Century (Vandenhoeck & Ruprecht, 2016); wrote (with Joel R. Beeke), A Puritan Theology: Doctrine for Life (Grand Rapids: Reformation Heritage Books, 2012); wrote Why Heaven Kissed Earth: The Christology of the Puritan Reformed Orthodox theologian, Thomas Goodwin (1600-1680) (Göttingen: Vandenhoeck & Ruprecht, 2010); edited (with Michael Haykin), Drawn into Controversie: Reformed Theological Diversity and Debates Within Seventeenth-Century British Puritanism (Göttingen: Vandenhoech & Ruprecht, 2011); and edited (with Kelly M. Kapic), The Ashgate Companion to John Owen (Ashgate, 2012), among other articles and essays.


Dr. Jason M. Rampelt

Fellow in Christianity and Science

B.A. | Case Western Reserve University | 1995
M.A.R. | Westminster Theological Seminary | 1997
M.A. | University of Pennsylvania | 2000
Th.M. | Westminster Theological Seminary | 2001
Ph.D. | University of Cambridge | 2005

Dr. Rampelt has studied Philosophy (BA, Case Western Reserve University; MA, University of Pennsylvania), Theology (MAR and Th.M., Westminster Theological Seminary, Philadelphia), and History and Philosophy of Science (PhD, Cambridge). After completing his doctoral studies in 2005, he was a research fellow at the newly formed Faraday Institute for Science and Religion, St. Edmund’s College, Cambridge (2006-2009). Since returning to the United States, Dr. Rampelt spent three years working in neuroscience labs at the University of Pittsburgh, and is now adjunct faculty in the same university in the Department of History and Philosophy of Science. His research has investigated the role of theology and theologians in the history of science, particularly the Early-Modern period, as well as the role of theology in scientific creativity since that time.


Dr. Benjamin Burkholder

Fellow in Scripture and Theology

M.Div. | Talbot School of Theology | 2008
Th.M. | Talbot School of Theology | 2009
Ph.D. | Duquesne University | 2015

Dr. Burkholder’s theological interests run vast and wide. Having completed a M.Div. in Spiritual Formation at Talbot School of Theology (2008), he is eager to commend living into the fullness of the spiritual life. For this reason, in addition to his work at Greystone he also serves on the Council and Board at Grafted Life Ministries whose goal is to help the church foster deeper relationships with Christ among its members. After completing the M.Div., he entered Talbot’s Th.M. program in New Testament (2009) and directed his academic energies to understanding the Apostle Paul’s theology of spiritual growth and how this should inform our own pursuit of spiritual wholeness. This degree also gave Dr. Burkholder a predilection for grounding theological reflections and formulations in Scripture and biblical theology. After Talbot, he entered the Ph.D. program in Systematic Theology at Duquesne University (2015). The diversity of the theological program opened up new vistas of inquiry. There he was introduced to Christian ethics and began thinking through how our worldviews impact the ways we choose to live our daily lives as well as make important ethical decisions. He also became immensely fascinated with thinking through what happens with our theology and understanding of the atonement when Jesus and the Gospels are interpreted from the viewpoint of the restoration theology of Second Temple Judaism. This interest birthed his Duquesne Ph.D. dissertation, which assesses René Girard’s soteriology by reading the Gospels as documents informed by the Jewish hopes for restoration of the Second Temple Period. Dr. Burkholder is a ruling elder at North Park Church (EPC).


Dr. David R. Head

Associate Fellow in Christianity and Literature

B.A. | Butler University | 1970
M.A. | Temple Theological Seminary | 1973
M.S. | Butler University | 1975
Ph.D. | Trinity College and Seminary | 2005
Ph.D. | Faulkner University | 2018

Dr. Head graduated cum laude from Butler University in English in 1970. He received a seminary degree in religious education from Temple Theological Seminary (1973). Dr. Head has served many years in public and Christian schools, as teacher and administrator. He holds an M.S. in school administration from Butler (1975) and a Ph.D. in Christian Education from Trinity College and Seminary, Newburgh, Indiana (2005) with a dissertation on the English Dissenting Academies. In 2018 he completed a second Ph.D. from the Great Books Honors College of Faulkner University, researching Dante’s synthesis of the classical and the Christian in his Divine Comedy. Dr. Head has taught Advanced Placement English Language/Literature & Composition for over twenty years, has served as a consultant-workshop presenter for College Board, including directing a summer program for teachers at the Indiana Academy of Science, Mathematics, and Humanities, and has been a reader/scorer for AP Literature essays for eleven summers. He has led nearly twenty overseas educational tours to the United Kingdom and Western Europe. His interests include directing plays and musicals and acting in Shakespearean roles in community and university theater. He has published articles in Indiana English, Indiana Scene and Christian Educator magazines, and has been awarded several fellowships from the National Endowment for the Humanities, including the Summer Institute in Florentine Renaissance Humanism. He currently teaches English in a Christian school and humanities at Southeastern University, Lakeland, FL. He attends Providence Baptist Church of Riverview, FL with his family.


Dr. William Dennison

Fellow in Apologetics

B.A. | Geneva College | 1973
M.Div. | Westminster Theological Seminary | 1976
Th.M. | Westminster Theological Seminary | 1980
Ph.D. | Michigan State University | 1992

Dr. Dennison is an accomplished author and teacher in apologetics and modern theology. His publications include Karl Marx. Modern Thinkers Series (Phillipsburg, NJ: P&R Publishing, forthcoming, 2016); In Defense of the Eschaton: Essays in Reformed Apologetics, edited by James Baird (Eugene OR: Wipf and Stock, 2015); The Young Bultmann: Context for His Understanding of God, 1884–1925. American University Studies Series 7, Theology and Religion (New York: Peter Lang, 2008); A Christian Approach to Interdisciplinary Studies: In Search of a Method and Starting Point (Eugene, OR: Wipf and Stock, 2007); and Paul’s Two-Age Construction and Apologetics (1985; rep. Eugene, OR: Wipf and Stock Publishers, 2000). Raised in western Pennsylvania, Dr. Dennison is a graduate of Geneva College majoring in Bible and philosophy. He graduated with an M.Div. and Th.M. in Theological Studies (Apologetics) from Westminster Theological Seminary in Philadelphia. He received a PhD in Interdisciplinary Studies (Philosophy, Theology, and History in 19th and 20th century Germany) from Michigan State University. He taught Bible 16 years at a Christian High School, and was an adjunct Associate Professor of Philosophy at Calvin College. Since 1993 he has taught in the Interdisciplinary Studies Department of Covenant College. He also served as Visiting Professor of Apologetics and Systematic Theology at Northwest Theological Seminary; and teaches as Instructor in Apologetics for the Ministerial Training Institute of the Orthodox Presbyterian Church (OPC). He has served as a regular Stated Supply for four various congregations and is an ordained teaching elder in the Orthodox Presbyterian Church.


Dr. Mark W. Graham

Fellow in Christianity and Late Antiquity

Dr. Graham guides research and lectures on themes and figures in late antiquity–a field which includes the late Roman Empire, early Medieval Europe, the rise of Islam, and the early Byzantine Empire–and he serves as an ancient history editor with The Greystone Review, Greystone’s annual journal.

An accomplished scholar and active churchman, Dr. Graham has taught in the History department at Grove City College since 2003, serving as full professor there since 2013. He has also held positions at Stanford University, the University of Chicago, and Yanbian University of Science and Technology (Jilin Province, China). He is the author, with Eric H. Cline, of Ancient Empires: From Mesopotamia to the Rise of Islam (New York: Cambridge University Press, June 2011); News and Frontier Consciousness in the Late Roman Empire (Ann Arbor: University of Michigan Press, 2006); and an extensive list of articles, essays, and reviews. His affiliations include Centro di Conservazionie Archeologica (Belmonte and Sardinia); Society for Late Antiquity; Bir Ftouha Excavations (Carthage, Tunisia); and the Yanbian University of Science and Technology.

Dr. Graham’s ongoing research and teaching have focused on the early rise of Christianity in the context of the ancient world. He is currently on sabbatical writing his next monograph. In addition to decades of academic honors, professional service as a peer reviewer and panel chair in various contexts, and Harvard and NEH fellowships, Dr. Graham has been recognized for his exceptional work in the classroom. His commitment to sound pedagogy and research training includes his leadership in student research development and in study abroad courses in the Galapagos Islands and Quito, Ecuador; in Rome, Pompeii, and Tunisia; in Thessaloniki, Greece and Instanbul, Turkey; and the equivalent of a year of time in Carthage.


Dr. Don Collett

Fellow in Old Testament | Director, Anglican Studies Program

B.S. | Montana State University at Bozeman | 1991
M.Div. | Westminster Seminary | 1997
Ph.D. | University of St. Andrews | 2007

The Rev. Dr. Don Collett is a native of Montana.  He graduated from Montana State University in Bozeman (1991) and Westminster Seminary in California (1997).  After church planting in the Bozeman area for five years, he studied abroad in Scotland under Christopher R. Seitz at the University of St Andrews, focusing on prophecy and hermeneutics and completing the PhD in 2007. He is associate professor of Old Testament and director of the MDiv program at Trinity School for Ministry in Ambridge, PA (USA), where he has been teaching since 2008.  He also teaches Old Testament courses on a biannual basis at the Alexandria School of Theology in Cairo, Egypt, and is an ordained priest in the Anglican Diocese of Egypt.  In addition to published articles and reviews in academic journals, as well as chapters in various books, he is currently engaged in writing a book on figural hermeneutics for Baker Academic, as well as a commentary on Hosea for T & T Clark Bloomsbury.


Dr. Alastair Roberts

Fellow in Scripture and Theology

Dipl. | Evangelical Theological College of Wales | 2004
M.Th. (Hons) | University of St. Andrews | 2008
Ph.D. | Durham University | 2015

Dr. Alastair Roberts (MTh, University of St Andrews; PhD, Durham University) writes in the areas of biblical theology and ethics, but frequently trespasses beyond these bounds. He has two books forthcoming with Crossway: Echoes of Exodus: Tracing Themes of Redemption Through Scripture, co-written with Andrew Wilson (March 2018); and Heirs Together: A Theology of the Sexes (November 2018). Dr. Roberts also participates in the weekly Mere Fidelity podcast, blogs at Alastair’s Adversaria, and tweets at @zugzwanged.




Fellow in Theology and History

BA (Hons) | University of Exeter
PGCE | University of Nottingham
MAR, ThM | Westminster Theological Seminary, Philadelphia
PhD | University of Aberdeen

The Rev. Dr. Robert (Bob) Letham is an eminent theologian and historian, and a superlative example of Greystone's commitment to careful patristic scholarship and confessional Reformed catholicity. Dr. Letham's 2010 Westminster Theological Journal article on the Westminster Assembly as a Reformed catholic body has been required reading in Greystone's core class on Reformed Catholicity since Greystone's founding. Dr. Letham teaches systematic theology and oversees research degrees at Union School of Theology (formerly Wales Evangelical School of Theology). He previously served as Senior Minister of Emmanuel Orthodox Presbyterian Church in Wilmington, Delaware, and has also taught at London School of Theology, Westminster Theological Seminary (Philadelphia) and Reformed Theological Seminary (Washington DC/Baltimore). Dr. Letham has authored numerous books, including The Work of Christ (IVP Academic, 1993); The Holy Trinity (Presbyterian & Reformed, 2004); The Westminster Assembly: Reading Its Theology in Historical Context (Presbyterian & Reformed, 2009); and Union with Christ (Presbyterian & Reformed, 2011). Robert and his wife Joan have three children and three grandchildren, and his interests include cricket, music and walking.



Fellow in Theology and Ethics

BA | Magdalen College, University of Oxford | 2002
BA | Oak Hill Theological College | 2010
ThM | Westminster Theological Seminary, Philadelphia | 2014
DPhil (cand.) | Oriel College, University of Oxford

Mr. Brooks serves as the Director of Greystone Oxford and works in theological ethics, exploring the rich relationship of virtue to personal and educational formation. Working from a critically informed grasp of Augustine's magisterial contributions to Christian models of virtue, Mr. Brooks provides an exceptionally trenchant analysis of the modern cultural and theological crisis of hope. In turn, he supplies a distinctly Christian vision for moral flourishing for a culture foundering on the false antitheses of modernity. Mr. Brooks has a special concern for undergraduate students, and pursues his research as the Director of The Oxford Global Leadership Initiative (2014-). Appreciating Oxford's important status as a thoroughfare for the education of international leaders, he works with The Oxford Pastorate as part of The Oxford Character Project which "seeks to help talented students develop key virtues of character which will prepare them to be the wise thinkers and good leaders the world so desperately needs."

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Dr. Garry WilliamS

Fellow in Theology and History

BA (1st) |  Christ Church, Oxford University
PGCE | Sidney Sussex College, Cambridge
MST |  Christ Church, Oxford
MA | Christ Church, Oxford

DPhil | The Queens College, Oxford

As Director of Greystone London and of the Pastors' Academy at London Seminary, Dr. Williams lectures and writes in theology and history. He also serves as Adjunct Professor of Historical Theology at Puritan Reformed Theological Seminary (Grand Rapids, MI), and lectures for the ThM and PhD programs at the Pastors' Academy. His long-term project is to publish a biblical, historical, and systematic study of the doctrine of penal substitutionary atonement. He also writes more popular works, including a volume offering encouragement and challenge to Christians today from the lives of figures in church history, and another on the God of love who has redeemed in love.