TWITTER will unveil its first Australian headquarters this week. The social networking giant has been steadily increasing its presence in Australia since late 2012, with a still-growing roster of staff and high profile partnerships with several sporting codes and media organisations. It will formally open its corporate offices in Sydney CBD this week - though staff have been working from the building for several weeks. Twitter also confirmed on Monday it has appointed former Google Asia-Pacific executive, Karen Stocks as its Australian managing director. The move comes as Twitter seeks to grow its pool of around two million Australian users and increase advertising revenue. A permanent presence in Australia may also help streamline cooperation with local authorities, who've previously asked social network companies to play a greater role in the fight against online bullying. Facebook increased its presence in Australia in 2011, hiring Mia Garlick, a former assistant secretary at the Department of Broadband, Communications and the Digital Economy to oversee its local operations. Google also has corporate offices in Sydney.