Between 2001 and 2010, Justin worked at Royal Perth Hospital (level 1 Trauma Centre for Western Australia) holding director positions for emergency medicine training and hospital junior doctor training. He was the RPH Director of Emergency Medicine from 2008-2010.
Justin joined the Western Australia Country Health Service in 2010 as the Director of Medical Service for one of the seven country regions, moving to Albany on the south coast of WA. In 2013, he was appointed the inaugural Director of Emergency Medicine for the Albany Health Campus.
Since 2016, Justin has been the Director of the WACHS Emergency Telehealth Service which expanded to become the Command Centre incorporating telehealth streams in emergency, inpatients, mental health, midwifery, after hours palliative care and the Acute Patient Transfer Coordination Centre for all interhospital transfers to, from and between the more than 107 supported country health facilities and metropolitan Perth.