Cubitt won the brief after a five-way pitch, and will promote the company to people and families worth more than £15m.
‘Although Stonehage has a South African heritage we'll look to internationalise the brand,' said Cubitt managing partner Simon Brocklebank-Fowler. ‘We're targeting specifically the sort of business people who have property, or live, in London, such as [Roman] Abramovich or [Lakshmi] Mittal.'
Brocklebank-Fowler reports to Stonehage Group CEO Giuseppe Ciucci and director in charge of marketing Robby Hilkowitz.
Stonehage was formerly part-owned by the Amalgamated Banks of South Africa and currently administers £10.6bn of client assets. It sets up and administers international trusts and companies on behalf of clients.
Its asset management arm, TriAlpha, manages £850m for institutions and families. The 30-year-old firm was subject to a management buyout in 2005.