Professor Johnson has been involved in the area of housing and homelessness for over two decades. His research investigates theoretical and applied questions relating to the dynamics of homelessness and housing. His research has contributed extensively to government policy and agency practice that address the housing and support needs of disadvantaged and low income households. He has co-authored a number of books, over 50 reports and refereed papers, as well as 8 book chapters. He has served on numerous Government committees and advisory bodies, and is a regular presenter at public and policy forums.
Professor Johnson is recognised nationally and internationally as a leader in innovative policy and practice relevant research. He is currently an Honorary Principal Research Fellow at The Melbourne Institute of Applied Economic and Social Research, The University of Melbourne, and in 2015 spent 12 months in the US as a Visiting Scholar at the School of Social Policy and Practice, University of Pennsylvania.