Roger obtained his PhD in pharmacology (Monash University) in 1988 from studies of the neuroendocrine actions of opioids. He subsequently moved to the Baker Institute and then to the Department of Surgery at the University of Melbourne to study the neural mechanisms involved in responses to hypovolaemia, with Professor John Ludbrook (1988-1992). In 1992 he returned to the Baker Institute to study the role of the kidney in the development of hypertension, with Professor Warwick Anderson. In 1996 he moved to Monash University,. He was an NHMRC Research Fellow from 1997 until 2010 and held a continuing teaching and research position from 2011 until his retirement in December 2020.
Roger remains actively involved in research projects related to critical care medicine, control of chronic disease in rural India, and the ecophysiology of turtle reproductive biology.
Roger was Editor in Chief of Clinical and Experimental Pharmacology and Physiology from 2006 until 2013 and Associate Editor of American Journal of Physiology - Regulatory, Integrative and Comparative Physiology (2013-2018) (http://ajpregu.physiology.org/). He also served on numerous editorial boards, including Kidney International and American Journal of Physiology - Renal Physiology.