Staff
Tom Greggs, DLitt, FRSE, arrives 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.
Tom Greggs
Director
Joshua Mauldin holds a PhD in theological ethics, and he 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.
Joshua Mauldin
Associate Director
Frederick Simmons received a B.A. in philosophy from Carleton College, an M.Div. from Yale Divinity School, and a Ph.D. in religious ethics from Yale University. He has taught at Princeton Theological Seminary, Yale Divinity School, Amherst College, La Pontificia Universidad Católica del Ecuador, and La Universidad Politécnica Salesiana; he has held research appointments at the University of Cambridge Faculty of Divinity and Boston University School of Theology. Co-editor of Astrobiology, Religion, and Society: Considering Life on a Planetary Scale (Cambridge University Press) and editor of Love and Christian Ethics: Engagements with Tradition, Theory, and Society (Georgetown University Press), his scholarship also appears in Faith and Philosophy, the Journal of Religious Ethics, Political Theology, and Studies in Christian Ethics. As Digital Research Officer and Co-ordinator of the Leverhulme Research Partnership, he contributes to the creation and dissemination of CTI scholarship.
Frederick Simmons
Digital Research Officer
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.
Sara Jaffe Reamy
Engagement Officer and Assistant to the Director
Sara Jaffe Reamy holds a Master of Arts in Spiritual Formation from Portland Seminary and a Bachelor of Arts in English from the University of Washington. She currently serves as the Engagement Officer and Assistant to the Director at CTI, where she plays a key role in supporting the Director and advancing CTI’s community engagement and development initiatives. Prior to joining CTI, Sara held several leadership roles at George Fox University, including Director of Engagement and Alumni Relations, Operations Manager for the Doctor of Nursing Practice programs, and Assistant Director of Portland Seminary. In these roles, she led efforts in program development, strategic outreach, annual giving, branding, and community engagement.
Robert Jones
Facilities Officer
Bob Jones has over thirty years of experience of working in collaboration with a variety of building stakeholders in Higher Education institutions, while supporting and sustaining the core values of the Administration. He brings his extensive knowledge and proficiency in facilities operations management to overseeing the maintenance, plant operations, engineering services, energy management, grounds, and custodial services in the Center’s newly renovated building. The Center relies on Bob’s professional expertise in project management, contract bidding and implementation, and regulation compliance to ensure the optimal operation of CTI’s state of the art facilities, always in the service of its interdisciplinary mission.
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.
Charles Guth
McDonald Agape Research Assistant
Sarah Joo
Princeton University Graduate Social Impact Fellow
Sarah Joo is a doctoral student in cognitive psychology at Princeton University, where she is a recipient of the Centennial Fellowship in the Natural Sciences and Engineering. Sarah is a member of the Concepts & Cognition Lab and is advised by Dr. Tania Lombrozo. Before coming to Princeton, she received a B.A. in philosophy from Yale University, where she also subsequently worked as a research fellow in the Cognitive Development Lab. Her research interests sit at the intersection of philosophy and psychology with a focus on laypeople’s understanding of different causal and explanatory relationships. Sarah’s research has been published in journals such as Mind & Language, Cognitive Science, and Cognition. Princeton University's Social Impact Fellowship places graduate students with partnering nonprofit institutions to provide opportunities for organizational experience and public-facing scholarship.