Tom Greggs
Director

Tom Greggs, DLitt, FRSE, arrived at CTI in summer 2025 from the University of Aberdeen, where he held The Marischal Chair of Divinity (founded in 1616) and served for over a decade as either Director of Research or Head of Divinity. A Fellow of the Royal Society of Edinburgh, Tom undertook studies in Theology at the University of Oxford (where he graduated first in his year) and a PhD in Systematic Theology at the University of Cambridge (where one of his mentors was the late Dan Hardy, first Director of CTI). He holds the higher Doctor of Letters degree for “research that marks an original and substantial contribution to humane learning.” Tom served on the UK government’s panel which assesses university research and serves on the World Council of Churches Faith and Order Commission. A prolific author, his most recent books include: Dogmatic Ecclesiology Volume 1; The Church in a World of Religions; Barth and Bonhoeffer as Contributors to Post-Liberal Ecclesiology; and The Breadth of Salvation.

Joshua Mauldin
Associate Director

Joshua Mauldin holds a PhD in theological ethics and is the author of Barth, Bonhoeffer, and Modern Politics (Oxford University Press, 2021), co-editor of the Oxford Handbook of Reinhold Niebuhr (Oxford University Press, 2021), editor of Political Theology in Chinese Society (Routledge, 2024), co-editor of The Future of Christian Realism (Lexington, 2023), and co-editor of Theology as Interdisciplinary Inquiry: Learning with and from the Natural and Human Sciences (Eerdmans, 2017). His research has been published in scholarly journals such as the Oxford Journal of Law and Religion, Theology Today, Political Theology, and the Journal of Law and Religion.

Michelle Tan
Executive Operations Officer

Michelle Tan is a graduate in marketing and psychology who brings extensive business experience to managing the Center and its nonprofit affairs. After running her own event planning business, where she developed her skills in the hospitality industry, she gained extensive operational experience as the business manager of a retail and wholesale company and more recently as Executive Director of Business Operation and Associate Head of a Princeton area non-profit school with a dual language immersion program and International Baccalaureate curriculum. Michelle, her husband, and two daughters enjoy living in the Princeton area and being involved in their local community.

Charles Guth
McDonald Agape Research Assistant

Charles Guth, PhD, began working as the McDonald Agape Research Assistant to Director Tom Greggs in the summer of 2025. His academic work focuses on the intersections of systematic theology and ethics, and pays particular attention to the doctrines of God, salvation, and Christian life. His current book project argues that God covenants with humanity to foster the trust in God necessary for humans to enjoy communion or friendship with God, and develops an account of how such friendship is central to human flourishing. His other publication projects include completing a series of articles on the nature of accountability and its importance for gender justice and policing, and serving as co-editor of a thematic issue on “Covenant” scheduled for publication in a forthcoming issue of Neue Zeitschrift für Systematische Theologie und Religionsphilosophie. During the 2021–2022 academic year, Charles was a Fulbright Research Fellow at the University of Geneva, Switzerland. 

Olga Kim-Toporsky
Executive Assistant

Olga Kim-Toporsky is Executive Assistant to the Director at the Center of Theological Inquiry, where she supports the Director's work and helps coordinate the Institute's operations and activities. She studied economics, business administration, and music before beginning her career in information technology. Prior to joining CTI, she held leadership roles in the property and casualty insurance industry, leading business and technology transformation and organizational change. Outside of work, Olga enjoys music, travel, and engaging with her local community.

Kelsey Nicholson
Administrative Assistant

Kelsey Nicholson is a dedicated professional with a background in administrative operations, customer service, marketing, and accounting. She is currently a student at Rowan University pursuing her Bachelor’s Degree in Psychology, with plans to obtain her Master’s Degree in Clinical Mental Health Counseling. Passionate about helping others, Kelsey brings organizational and problem-solving skills to her work. In her free time, she enjoys traveling, crafting, and being involved in her local community.


Rachel Uwada Clifford
Princeton University Graduate Social Impact Fellow

Rachael Uwada Clifford is a writer and joint PhD candidate in the Department of English and the Interdisciplinary Doctoral Program in the Humanities at Princeton University, where she also holds a President’s Fellowship. She is currently completing her dissertation on the legacy of early modern ideas about nature in Black and Indigenous women’s literature. In it, she narrates modern tendencies and trajectories in Black and Indigenous women’s ecological thought, all of which converge on the idea of the earth as a living thing—presenting a vibrant counterpoint to the mechanistic world view that emerged from sixteenth- and seventeenth-century Europe, and that largely continues to structure interactions between human and nonhuman nature today. Before coming to Princeton, she received her BA from Hampshire College and her MFA from the the Writing Seminars at Johns Hopkins University, where she also taught creative writing.

Hasan Hameed
Princeton University Graduate Social Impact Fellow

Hasan Hameed is a historian and scholar of religion. Working with the rich literatures of the Islamic world in Arabic, Persian, and Urdu, he studies how texts travel across regions and empires and shape ethical selves and communities. His writings have been published in scholarly venues such as Modern Intellectual History and Contextual Alternate.  Hasan is also committed to public scholarship. He has written on the “decline” of Islamic philosophy for The Marginalia Review of Books, on the ethics of visiting the sick for The Daily Princetonian, and on the everyday challenges of Muslim students for MuslimMatters.org and The Nassau Weekly. As a fellow for the Center of Culture, Society and Religion (CCSR) at Princeton, he helped produce a youtube video on simple believers in the medieval Christian world and organized a public conversation on Islam and race. He has also lectured extensively at different mosques, community centres, and interfaith gatherings across the US. Hasan earned a Master's degree at the University of Oxford and is currently pursuing a PhD in History and Islamic Studies at Princeton University. As a Social Impact Fellow, he is excited to help expand CTI's public programming.