In 1992 he graduated from Goldsmiths, University of London with an Honours Degree in Communications Studies and Sociology.
During the 1980s John was well known as a top Freestyle BMX rider and was featured on the front cover of the magazine BMX Biker issue 11. John"s career in the film industry began in 1986 as projectionist at the Rex Cinema in Wareham, Dorset. Soon after he began working in casting, establishing a mobile video business, specializing in screen-tests.
During that time he worked with directors including Sydney Pollack, Milos Forman, Tim Burton, John Schlesinger and Alan Parker.
In 2001 John wrote and directed the sort film Chopsticks, starring Ron Moody. The film was a finalist in the 2002 Turner Classic Movies short film competition.
The United Kingdom Film Council and the David Lean Foundation awarded John a scholarship in 2003 to complete his Master"s degree in scriptwriting at University of California, Los Angeles, after which he moved permanently to Los Angeles in 2004. Actress Zoe Saldana is currently attached both as producer and to star in the lead role.
In 2012 John was employed by Activision to write the next installment of the game series Call Of Duty for Sledgehammer Games.
Titled Advanced Warfare, it became the top-selling video game of 2014.