Hiscox was born in Owen Sound, Ontario and grew up in a medical family.

in French language and literature and from the University of Western Ontario in 1987 with a master's degree in journalism.

She also co-hosted a morning show on 1290 CJBK in London, Ontario with Steve Garrison from 1990–1991.

In 1988–89, she did a variety of radio shifts at London's Rock FM96 CFPL-FM including afternoon drive and evenings.

In 1997, she appeared on the CIQC AM 600 Montreal program Travel World as part of a feature headlined as "The Hidden Holiday Hide-away Haunts of Heather Hiscox".