After gaining his Doctorate, Grenville worked in a small market research organisation in the food and beverage industry for 6 years. Tiring of the hard slog of making Coco Pops taste ever better Grenville became a registered Psychologist and worked on the Hepatitis NSW Helpline and in a research project with the University of Sydney in community pharmacies. Grenville then worked for 8 years as research manager in a rapidly growing mental health community managed organisation. Grenville is now semi-retired but is still engaged with a number of research and community organisations. Although much of it is a distant memory Grenville identifies as someone with lived experience of hepatitis C, injecting drug use, mental health issues, suicide and secondary homelessness.