Green spent his early working life as a country school teacher, which was reflected in his script for the 1974 ABC TV series, Marion.

[1] He was able to write in a wide variety of genres, and his screenplay for Peter Weir’s Picnic At Hanging Rock was a landmark in the renaissance of the Australian film industry in the 1970s.

[1] In 1981, the Australian Broadcasting Corporation produced I Can Jump Puddles, a mini-series written by Green, based on Alan Marshall's autobiographical stories.

[1] In the 2009 Queen's Birthday Honours List, he was awarded the Order of Australia Medal for services to the Australian film and television industry as a screenwriter and educator.

In at least one screenwriting textbook, his writing for television is cited as an example of economy, wit and minimal formal camera directions.