Known for his role on ABC TV's Gardening Australia, Byrne combines his passion for plants with a commitment to environmental stewardship.

Byrne's journey began with a Bachelor of Science with Honours in Environmental Science from Murdoch University. Early in his career, he recognised the need for sustainable practices in urban settings, leading him to focus on integrating ecology with horticulture. His work is characterised by innovative approaches to water conservation, energy efficiency, waste avoidance and the use of native plants for urban biodiversity.

As a presenter on Gardening Australia, Byrne has become a household name, educating viewers on sustainable gardening practices. His segments feature practical tips on water-wise gardening, organic food production, and soil health. Byrne's approachable style and deep knowledge have inspired many Australians to adopt more sustainable practices in their own gardens.

Beyond television, Byrne is a respected researcher, author and consultant. His projects often explore the intersection of horticulture and sustainable design. Notably, he was involved in the development of ‘Josh's House’, a groundbreaking demonstration project near Fremantle, Western Australia. This sustainable home showcases best practices in energy efficiency, water management, and garden design, serving as a model for sustainable living. As Director of Fremantle based Landscape Architecture and Sustainability practice, Josh Byrne & Associates, he applies these principles to large-scale urban development projects. 

Byrne's contributions extend to academia and public policy. He has authored numerous journal papers and industry guides on water sensitive design and sustainable urbanism, and is Dean of Sustainable Futures in the Faculty of Humanities at Curtin University where he supports learning and teaching, research and engagement activities. His expertise is frequently sought by government and industry, particularly in the areas of urban design and environmental sustainability.

Through his various roles, Byrne has significantly influenced public perception and practices regarding urban sustainability. His work emphasises the importance of designing urban spaces that are not only beautiful but also environmentally responsible.