Prime Minister David Cameron has appointed his former adviser on European and global issues as permanent secretary to the Treasury, it said today.
In a statement it said Tom Scholar, who was also head of the European and global issues secretariat in the Cabinet Office, had been appointed after an "open competition".
George Osborne called Scholar an "outstanding civil servant".
"[He has] experience of advising on some of the biggest challenges facing the country in recent years," he added
"It is a tribute to the British civil service that the field of candidates was so strong. Having worked closely with Tom, I know he will be a great leader of the Treasury and a worthy successor to Nick Macpherson."