Joseph Tannous founded Cornerstone Group in 2011 and has since built it into one of Australia’s leading bipartisan government relations consultancies. He first entered public life in 1999 as the youngest Mayor in New South Wales, before serving in senior roles within the Liberal Party, including on the NSW State Executive and leading several successful State and Federal election campaigns.
Joseph has advised major corporations across diverse industries, cultivating trusted working relationships with leaders at all levels of government. His career blends political insight with practical advocacy and a strong instinct for effective public policy. At Cornerstone, Joseph continues to drive strategy and client outcomes, ensuring the firm remains a trusted partner across the political spectrum.