In 1985 Greene started co-operating with Alois Treindl, founder of Swiss-based Astrodienst, on the development of computer-generated horoscopes, which would present a person with a chart synthesis, simulating Greene's own method of horoscope interpretation during a personal reading.

In addition, she also directs CPA Press, a publishing company that focuses on specialist astrological works.

Greene wrote a historical novel in 1980, The Dreamer of the Vine, dealing with the themes of Nostradamus and Jesus bloodline.

In addition to giving frequent lectures and directing a certificate programme in psychological astrology, Greene has continued to produce many books, all of which are now published by her own company, the CPA Press.

In April 2010 the History Department of the University of Bristol, UK, granted her a doctorate degree for her thesis 'The Kabbalah in British Occultism 1860-1940'.