A U.S. citizen who was recently a senior executive at the Commonwealth Bank of Australia pleaded not guilty in a Sydney court Wednesday to charges that he accepted bribes to award a contract to a U.S. information technology firm. Keith Robert Hunter , 61, formerly of San Francisco, and his alleged accomplice - another Sydney-based American who has not been named - were allegedly paid $2.19 million for awarding a bank contract to ServiceMesh without a tender, according to court documents.