Declan O’Byrne was born in Dublin, Ireland. He completed his STL in Systematic Theology at the Milltown Institute of Philosophy and Theology, and his doctorate in Systematic Theology at the Mater Dei Institute of Education (Dublin City University). He is the author of Spirit Christology and Trinity in the Theology of David Coffey (Lang: 2010). He taught at Tangaza and Hekima Colleges (Catholic University of Eastern Africa, Nairobi), and is currently teaching at Sophia University Institute (Loppiano, Florence) and at the Pontifical Urbaniana University (Rome).