Howson was born on April 19, 1974 in Sydney, Australia.
His first credited role in the industry was as Greg Barrett on the Australian soap "Home and Away". He went on to be an additional assistant director for TV series All Saints in 1998, and one year after that, he played Rory, a guest role in a 1999 episode of Water Rats.
Hilton then worked for Attack of the Clones in the effects department, performing an uncredited role as one of the background creatures of the movie.
After this, he has been production assistant for movies such as Danny Deckchair (2003, Jeff Balsmeyer), Peter Pan (2003, P.J. Hogan) or TV movie The Alice (2004, Kate Dennis), as well as different TV series. More recently, he's been production secretary for Footy Legends (2006, Khoa Do) and the successful Australia (2008, Baz Luhrmann), as well as production coordinator for The Catalpa Rescue (2007, Lisa Harney), The Last Confession of Alexander Pearce (2008, Michael James Rowland) the TV series Bombora: The Story of Australian Surfing (2009) Making Australia Happy (2010) and Australian soap Home and Away (present as of 2015).