Since 2000, ROC has actively explored and appraised several operated Perth Basin exploration permits, which have subsequently been surrendered. In 2001, ROC's first well in Australia discovered the Cliff Head Oil Field, the first (and currently only) commercial oil discovery in the offshore Perth Basin. Subsequent appraisal and development saw the field come online in May 2006, less than 14 months after project sanction. ROC developed and operated the Cliff Head field until May 2017 without significant safety or environment incident since start-up, when it sold its 42.5% interest in the field, effective 1 January 2017.
Despite its recent sale of Cliff Head, ROC's strategy is to maintain and grow its presence in Australia via the acquisition of high quality oil and gas assets.