(Reuters) - HSBC on Thursday appointed Kaber Mclean as chief executive officer of its Australian unit as the lender seeks to expand its footprint in the region, even as its Hong Kong operations continue to face pressure from anti-government riots.Mclean, who has been with the bank since 1996, held many senior roles including a stint as president and CEO of HSBC Japan between 2012 and 2016.Mclean will lead the push into Australian markets as the company aims to expand its share in the region's..