His short story "The Clockwork Atom Bomb" was nominated for a 2005 Hugo Award.
Interzone published a special issue devoted to Green and his stories in July 2009.
He graduated in English from St Catharine's College, Cambridge and works in information technology.
In 2011, he electronically published a young adult SF novel, Saucerers and Gondoliers, the first of a series set in and around the fictional United States of the Zodiac, a secret set of colonies in space involved in a struggle for independence from Britain and the United States, as well as political and military intrigue involving the former Soviet colonies and alien/Nazi symbiotes.
The series is named after its two primary characters, Anthony Stevens and Cleopatra Shakespeare, two UFO-abducted teenagers from Northampton.