The Organization of Petroleum Exporting Countries (OPEC) was established in 1960, and Indonesia became the seventh country to join in 1962. However, Indonesia suspended her membership for seven years from January 2009, and has just rejoined in January of this year. During her initial 27-year tenure, Indonesia’s representatives held the position of Secretary General four times, for a total of 10 years. This article will give a brief historical overview of OPEC, as well as that of Indonesia’s oil and gas sector and her relationship with OPEC.