Prior to this, Mr Donohoe was COO and a partner of Dune Capital Management. He will be jointly responsibile for risk management with Edmond Moriarty, the chief risk officer of the company. Mr Moriarty will also report to Mr Thain.

Mr Thain said: I am very pleased that Noel is joining the Merrill Lynch team. Noel’s appointment and the new reporting structure of risk management emphasize the importance of this area to me and to Merrill Lynch.