The positions on offer, according to documents seen by the news agency, include global chief investment officer, global head of managed investments, global head of manager research and due diligence and US head of investments.

The group also wants to add 25-35 private bankers across North America.

A Citi spokesman would not comment to the publication on the search, but said: "Private Bank is a key growth business of Citigroup, leveraging Citi's global platform to deliver solutions for our clients."