Justine began her sound career as a music recording engineer and producer. From there, she got into live sound reinforcement for music and theatre.

After being offered a three-month contract at ABC-TV in Sydney, she found herself pursuing a new audio discipline. Ten years at the ABC gave Justine a varied and comprehensive grounding in sound-to-picture. Both production – sound recording and live TV studio – and post production sound – music editing, sound FX creation and editing, foley walking and recording, and dialogue editing.