Andrew Bailey, the man who will take over Hector Sants' duties next month, has been appointed to the Bank of England's interim Financial Policy Committee (FPC).
He will join the committee at its next meeting, replacing Sants, who is standing down this month.
Bailey will also become the head of the Prudential Business Unit within the Financial Services Authority (FSA) when Sants leaves the organisation at the end of June.
He will hold both roles on an interim basis until a chief executive of the new Prudential Regulation Authority and deputy governor of the Bank of England for Prudential Regulation has been appointed and taken up their position.
The interim FPC was established ahead of the formal creation of the body through the Financial Services Bill, which is currently going through parliament.
It will be responsible for the stability of the financial system as a whole.
