Mackey joined Ally Financial shortly after Ally became a bank holding company. As CFO, he helped transform the company into a leading diversified digital bank, ultimately laying the foundation for significant capital raises. At Bank of America, he led a global team through the financial crisis, with finance responsibility for the parent company and several banking subsidiaries. He played a key role in business, finance and treasury activities related to several major acquisitions. He began his career at PwC, after earning his master's in accounting and bachelor's in business administration from the Kenan-Flagler Business School at the University of North Carolina at Chapel Hill. The transition comes as Lunak announces her retirement. Lunak joined BankUnited in 2010 and assumed the CFO role in 2013. Before rising to her current position, she held the roles of executive vice president, chief accounting officer and senior vice president, finance.