Having qualified at the University of Melbourne and the University of California Berkeley, Hilary registered as an architect in Australia in 1998. She spent over seven years at Six Degrees, one of Australia's leading architectural practices and was made an Associate in 2011. She relocated to the UK, her birthplace, and in 2012 established her architectural practice in England's South West. 

HL Architecture work on a wide range of projects covering high-concept residential design through to commercial and institutional buildings.