John Procopiadis was born in 1935 to a Turkish-speaking Greek couple from Cappadocia in central Turkey. His father was a confectioner. His mother was a home-maker and skilled Persian carpet weaver. John grew up in Surry Hills, attended Crown Street Public School and, later, Cleveland Street High School. In the early 1950s, after their council-owned home was sold, the family moved to Kensington. After finishing high school, John became a mechanic. For several years, he had his own workshop. He then worked as a sales representative for Stuart Alexander & Co Pty Ltd, an importer, marketer and distributor for tobacco products. He was a founding member of the PanHellenic Soccer Club, and, between 1994 and 2012, was elected as a councillor on the Randwick City Council. Between 2009 and 2010, John was mayor of Randwick.