Contact Information


Dr. Bordeianu's research focuses on ecumenical ecclesiologies, especially the dialogue between the Orthodox and Catholic churches, the relationship between the Trinity and the Church, theology of creation, and environmental issues. He is particularly engaged with the ecclesiology of the Romanian Orthodox theologian Dumitru Staniloae, placing special emphasis on Staniloae's contribution in ecumenical discussions on the Church.

His book, Dumitru Staniloae: An Ecumenical Ecclesiology has been published by Continuum (2011), also published in Romanian translation, Pr. Dumitru Staniloae: O ecleziologie in dialog (2022). He is also the editor of, It Is the Spirit Who Gives Life: New Directions in Pneumatology (Washington, DC: CUA Press, 2022) and will soon publish the monograph entitled, The Church: Icon of the Kingdom of God with CUA Press. His other works appeared in Pro Ecclesia, Journal of Ecumenical Studies, Downside Review, Journal of Eastern Christian Studies, Oxford Handbook of Ecumenical Studies, Theological Studies, book chapters, etc. He has presented numerous academic papers and was invited guest lecturer nationally and internationally. He has also been interviewed on television, radio, and newspapers.

He also served as President of the Orthodox Theological Society in America (OTSA) and is a member of the North American Orthodox-Catholic Theological Consultation. He is also one of the co-conveners of the Jewish-Christian Dialogue in Pittsburgh, PA. Dr. Bordeianu is involved in various capacities with the most active ecumenical organization in the area, namely Christian Associates of Southwest Pennsylvania.


Ph.D., Theology, Marquette University, 2006
Th.M., Theology, Duke University, 2000
M.A., Theology, Iasi, Romania, 1999

Courses & Scholarship


  • The Church - Icon of the Kingdom of God (Ph.D.)
  • Primacies (Ph.D.)
  • Contemporary Ecumenical Ecclesiologies (Ph.D)
  • Ecclesiology (MA)
  • Christology (MA)
  • Preaching and Catechesis in the Early Church (Independent Study for Aquinas Institute, D.Min.)

Honors College

  • Christology
  • Ecumenism and Anthropology 



  • Honors Theology
  • Faith and Reason
  • Intro to the Bible
  • Jesus the Christ; Eastern Christianity (advanced undegraduate)
  • Theological Views of the Person


 Dumitru Staniloae: An Ecumenical Ecclesiology (T&T Clark, 2011). 

Widely considered the most important Orthodox theologian of the twentieth century, Dumitru Staniloae (1903-1993) contributed significantly to an ecumenical understanding of these themes. Because of his isolation by the Romanian Communist regime, his work still awaits its merited reception, especially given its potential contribution towards Christian unity.  In Staniloae's understanding the Church is a communion in the image of the Trinity. Because there is a continuum of grace between the Trinity and the Church, the same relationships that exist among trinitarian persons are manifested in creation in general, and the Church in particular. In this way, the Trinity fills the world and the Church, determining their mode of existence. Intratrinitarian relationships are manifested in the relationships between humankind and non-human creation, the Church and the world, local and universal aspects of the Church, clergy and the people, and among various charisms. 

Select Articles

"Orthodox Observers at the Second Vatican Council and Intra-Orthodox Dynamics," in Theological Studies 79, no. 1 (2018): 86-106. [pdf]

"The Unity We Seek: Orthodox Perspectives." In The [Oxford] Handbook of Ecumenical Studies, edited by Geoffrey Wainwright and Paul McPartlan. Oxford: Oxford University Press (Online 2018). [pdf]

"Getting from Conflict to Communion: Ecclesiology at the Center of Recent Lutheran-Orthodox Dialogues and the 2016 Orthodox Council of Crete," in Worship 91, November (2017): 518-539. [pdf]

"The Church: Towards A Common Vision: A Commentary in Light of the Inter-Orthodox Consultation at Agia Napa in Cyprus." In Exchange: Journal of Missiological and Ecumenical Research (Brill) 44, no. 3 (2015): 231-249. [pdf]

"The Biblical Nature of the Church and the Ecclesial Nature of the Bible: An Analysis of Fr. Dumitru Stăniloae's Ecclesiology." In Studii Teologice 2 (2013): 165-­188. [pdf]

"Primacies and Primacy According to John Zizioulas," St. Vladimir's Theological Quarterly 58 (2014): 5-24. [pdf]

Priesthood, Natural, Universal, and Ordained: Dumitru Staniloae's Communion Ecclesiology," Pro Ecclesia 19 (2010): 405-433.[pdf]

"The Contribution of Dumitru Staniloae's Ecclesiology to Ecumenism and Society, Journal of Eastern Christian Studies 62 (2010): 55-85. [pdf]

"Orthodox-Catholic Dialogue: Retrieving Eucharistic Ecclesiology," Journal of Ecumenical Studies 44, no. 2 (2009): 239-65. [pdf]

Review of Dumitru Staniloae, Orthodox Spirituality: A Practical Guide for the Faithful and a Definitive Manual for the Scholar (South Canaan, PA: St. Tikhon's Seminary Press, 2002), in Archaeus 12-13 (2007-2008): 414-416. [pdf] 

"Maximus and Ecology: The Relevance of Maximus the Confessor's Theology of Creation for the Present Ecological Crisis" The Downside Review 127 (2009): 103-126. [pdf]