Simon started his current position as secretary for the Department of Justice in Tasmanian in July 2012. He was chief commissioner of Victoria Police from March 2009 until mid-2011.
Simon began his career in the Australian Federal Police, serving 19 years there before being appointed assistant commissioner (crime) with Victoria Police in 2003. He is credited with a prominent role in bringing an end to the Melbourne gangland murders and associated crime in Victoria.
Simon holds a Bachelor of Arts in Administration and Graduate Diploma in Legal Studies from the University of Canberra and a Bachelor of Laws with first class honours from the Australian National University. He has demonstrated a strong commitment to social justice throughout his career.