Sergio Riquelme comes from Chile. He has a vast academic and linguistic preparation in Spanish which includes self education in complete philosophical studies; Bachelor degrees in History and Education as well as a degree as a Secondary School teacher. Sergio is a lecturer in the Education Faculty of the Catholic University of Chile. He is currently on a scholarship gained at his university, completing his PhD in Educational Studies at the University of Melbourne. He has taught at several Chilean universities specializing in the area of teachers' training. He has also worked for secondary schools in his country. Sergio's teaching and learning methods were based on the Reflexive Conversation Approach - whereby students and teacher build on knowledge which is relevant for both parties. He worked in Chile in projects of community education for more than a decade that provided training which incorporated new pedagogical and linguistic strategies for women employed as domestic workers to help them develop critical thought. His pedagogical praxis is based on the principle that human beings are linguistic animals that develop themselves through discourse and that they have the innate ability to learn more than one language.

Sergio Riquelme is a current member of the Spanish Speaking Broadcasting Group of 3ZZZ, an ethnic radio station in Melbourne. In this role, he has carried out broadcasting as well as production duties in radio programs for Spanish speaking people and for people learning Spanish as a second language. He is the Secretary of this Spanish broadcasting group as well as a member of Radio 3ZZZ Council.