At the University of St Andrews, Davidson was Head of School and Dean of the Faculty of Divinity and Principal of St Mary's College, 2010–13. He was educated in Classics and Theology at the University of Glasgow and the University of Edinburgh.
Books
Salvation. Bloomsbury T & T Clark 2016
A Short History of Arianism. Cambridge University Press 2017
The Cambridge Handbook of Early Christian Theology. Cambridge University Press 2017
The Study of Theology. SPCK 2017
God of Salvation: Soteriology in Theological Perspective. Ivor J. Davidson and Murray A. Rae. Ashgate 2011.
A Public Faith: From Constantine to the Medieval World, AD 312-600. Baker/Monarch 2005
Birth of the Church: From Jesus to Constantine, AD 30-312., Baker, 2004/Monarch, 2005
Ambrose: De Officiis : Edited with an Introduction, Translation and Commentary (2 vols). Oxford University Press, 2002