His client list has included the Catholic Bishops' Conference of England and Wales, Edinburgh College of Art, the Vatican Museums (of which he is a UK trustee), The Rosslyn Chapel, Worth Abbey and the World Monuments Fund (GB) amongst others.
The Irish Episcopal Conference retained McCaffrey as their fundraising advisor for the International Eucharistic Congress which took place in Dublin in 2012.
In May 2006, Pope Benedict XVI recognised his service to the Roman Catholic Church by bestowing the Order of St. Gregory the Great on McCaffrey, with the title Knight Commander.
In May 2019 Pope Francis bestowed a promotion on McCaffrey to Knight Grand Cross of the Order of Saint Gregory, the highest rank given to a layperson, carrying with it the title 'Excellency'.
He is a writer and photographer as well as a donor to various charitable causes, including the work of the Order of the Holy Sepulchre of Jerusalem, The Terrence Higgins Trust[4] and Bethlehem University.