Dr. Aaron T. Hollander is the Executive Director of Graymoor Ecumenical & Interreligious Institute (GEII). He is responsible for developing and sustaining the programs, publications, and partnerships of the Institute, while serving as GEII’s public representative in interchurch/interreligious, academic, and civic dialogue settings. He is the Editor of GEII’s award-winning journal of accessible public scholarship, Ecumenical Trends; he organizes dialogues, workshops, retreats, and other educational programming to equip participants with resources for humane dialogue and collaborative action; he carries out research into the histories of conflict and the dynamics of peacebuilding within and between religious communities, strengthening the Institute’s involvement with the academy of religion; and he serves on The Interchurch Center’s Committee for Ecumenical, Interreligious, and Community Concerns, maintaining the legacy of the building as a home for meaningful collaboration between organizations dedicated to the common good.

Dr. Hollander earned his PhD in Theology from the University of Chicago Divinity School (2018), his MPhil with Distinction in Ecumenical Studies from Trinity College Dublin (2009), and his BA with Highest Honors from Swarthmore College (2007). He is a scholar of contextual theology and lived religion, whose ongoing research foci include the dynamics of ecumenical/interreligious conflict and coexistence, the aesthetic texture and political power of holiness (particularly in Orthodox Christianity), and the circulation of theological understanding beyond explicitly religious settings. Dr. Hollander co-teaches the Centro Pro Unione Summer Course in Ecumenism and serves as adjunct faculty in Theology at Fordham University. He is the author of Saint George Liberator: Hagiography and Resistance in the Modern Mediterranean (Fordham University Press, 2025), a historical-ethnographic study that illuminates how representations of Orthodox Christian saints serve as means of resistance in contexts of imperial and colonial domination. He has also published numerous scholarly articles, chapters, and reviews in the fields of ecumenical theology, political theology, theology and popular culture, ecclesiology, world Christianity, interreligious studies, material religion, and comparative hagiology.

Dr. Hollander was President of the North American Academy of Ecumenists from 2022-2024, and he serves on the steering committee of the Ecclesiological Investigations International Research Network. His research has been awarded grants by the Fulbright US Student Program, the American Academy of Religion, the Council of American Overseas Research Centers, and the University of Chicago, and he has been an invited speaker at the University of San Francisco, the Oslo Coalition on Freedom of Religion and Belief, the Cathedral of St. John the Divine in New York City, and Princeton Theological Seminary. He is available to lead workshops, seminars, or other educational programming pertaining to ecumenical/interreligious history, methods, and peace processes.