For over two decades, Billie and a multi-disciplinary research team have been studying the impact of the built environment on health and wellbeing.

She has published over 400 articles, book chapters and reports, and by citations, is ranked in the top 1% of researchers in her field globally. She is an Honorary Fellow of both the Planning Institute of Australia and the Public Health Association and a Fulbright Scholar. In 2016, she was awarded an NHMRC Elizabeth Blackburn Fellowship as the top ranked female fellow in public health in 2015; and in 2020, she was awarded the Town and Country Association’s Sir James Barrett Memorial Medal.

She is a member of the Victorian Office of the Government Architect Design Review Panel, the Victorian Planning Authority’s Precinct Structure Plan Review Committee and Melbourne Water’s Liveability Panel.