Europe's largest bank, which is based in London, said Mr Gulliver would retire on 21st February to be replaced by the HSBC veteran, who now heads its retail banking and wealth management divisions.
The bank said in statement Thursday that Flint, who now heads up retail banking and wealth management, will take the job on February 21. Flint now leads the company's retail banking and wealth management services. He has previously served as the bank's treasurer, chief executive of its global asset management business, and as chief of staff for Mr. Gulliver. He has also worked in the Far East and the USA, before becoming group treasurer in 2006 and boss of HSBC's global asset management arm in 2011.
Chairman Mark Tucker says Flint has "great understanding and regard for HSBC's heritage, and the passion to build the bank for the next generation".
"The bank is very well-positioned for the future but we must continue to innovate and accelerate the pace of change required to meet the expectations of our shareholders, customers, employees and society at large", Flint said in a statement.
Despite his long service at HSBC, Flint indicated that he was hoping to make changes during his tenure.