David co-founded TREENET (Tree and Roadway Experimental and Educational Network) in 1997 and was its Director until December 2012. He is also responsible for founding the “Avenues of Honour 1915-2015” project in 2004. With a Degree in Agricultural Science and a long horticultural history in the nursery and landscaping industry, David is a respected champion for effective establishment and retention of trees in urban settings, particularly street trees. David invented and commercialised the TREENET Inlet, a device which can be fitted into the tightest of streetscapes to harvest stormwater to provide passive irrigation for trees even in reactive clay soil. David is Managing Director of Space Down Under, which manufactures TREENET Inlets and other products which support urban forestry. In 2008 he was awarded the Medal of the Order of Australia: “For service to arboriculture and the environment, particularly through research and support for sustainable plantings in the urban landscape, and to the community through the Avenues of Honour project.”
Harsha is a water and environmental engineer with over twelve years of experience in field monitoring, hydraulic modelling, water quality and environmental impact assessment. She is working as a Research and Development Manager at Space Down Under. Harsha obtained her PhD from the University of South Australia in 2020.
Harsha has covered multiple sectors including stormwater, wastewater, recycling of waste material, environmental impacts, and water and waste economics. Harsha is an active volunteer steering group member of Water Sensitive SA and a committee member of Stormwater SA. Harsha is a futurist who is a passionate researcher in the circular economy, water sector and urban greening.
Passionate about insects, birds, invertebrates, and their habitat, when Joseph doesn’t work on plant growth projects and inlet manufacture in Space Down Under workshop, he attends his numerous aquariums and terrariums, homes to his pet fish, crustaceans, isopods and plants. His knowledge on fauna and flora is a great asset to the team.