As Political Counsellor in London McDonagh played a part in the Northern Ireland peace process in the build-up to the
Belfast Agreement. McDonagh served as Ambassador to India (1999-2004), the Holy See (2004-2007), Finland (2007-2009), Russia (2009-2013) and the OSCE(2013-2017). After retirement from the diplomatic service, he was appointed Senior Fellow at the Edward M. Kennedy Institute, at
Maynooth University and, in a parallel appointment, Distinguished Global Fellow at the Center of Theological Inquiry,
Princeton University. In May 2020 he was appointed Director of the newly-founded Centre for Religion, Human Values and International Relations at Dublin City University. He is a member of the Advisory Council of the Institute for Economics and Peace (Sydney), the Advisory Council of the
Institute for Integrated Transitions (Barcelona) and a member of the Steering Committee of the OSCE Academic Network (Hamburg), ==Publications==