Dr Tammy Hand is the Deputy CEO of Upstream Australia Ltd, and a founding member of the Upstream International Living Lab that is focused on the development and international scale-up of ‘upstream’ solutions to youth homelessness, including the COSS Model. She is an experienced social researcher whose broad interests are focused on social and educational outcomes for young people, specifically at the intersections of in/equality, structural and non-structural barriers, social and system change and reform. Tammy is an adjunct senior research fellow at the Gonski Institute for Education at the University of New South Wales. Much of Tammy’s current work is focused on system reform for increased efficiency and effectiveness and she manages the implementation and development of COSS site expansion and led the developmental evaluation (2019-2023) of the funded pilot site in Albury, NSW – the Albury Project.