Incoming Citigroup chief executive, Jane Fraser, has unveiled a number of executives into key management roles as she starts to make her mark on the business ahead of taking charge of the Wall Street lender.

Fraser, who is set to become the first female leader of a major Wall Street bank when she takes over from Michael Corbat in the next few weeks, has named a new chief risk officer, chief of staff and CEO of the banking unit that holds the majority of Citigroup's assets, according to an internal memo seen by Financial News.