Sydney- Former Granada Australia executive Rory Callaghan has been appointed Managing Director of the Endemol Southern Star joint venture, succeeding Kris Noble, who decided to step back from a full-time role in the production business. Noble will continue to work with Southern Star as a consultant on drama development and production as well as pursuing interests outside the media. In a management restructuring announced by Southern Star Group Chief Executive Hugh Marks, Callaghan also assumes overall responsibility for the production activities of Southern Star Entertainment. Previously Managing Director of Granada Productions Australia, Callaghan joined Endemol Southern Star in January 2006.