[1] One of his early acquisitions for Newcastle was Laus veneris by Edward Burne-Jones.
In 1977 he became the curator of York Art Gallery, a post he held until 2003 when he left to become an independent art historian.
[2] As curator at York Art Gallery, Green was present during the armed robbery of January 1999 in which staff were tied up and threatened, and over £700,000 of paintings were stolen.
[2] Green is an honorary visiting fellow in the Department of Art History at the University of York.
[1] He was elected as a Fellow of the Society of Antiquaries of London in 2014.