Contract negotiations are understood to be in their final stage, and Anderson will make the move in October after less than a year at RBS. He was previously head of comms and marketing at Barclays Capital (PRWeek, 21 October 2005).
Anderson will become one of two directors at Cubitt reporting to managing partner Simon Brocklebank-Fowler. The move represents Anderson's first foray into agency life after 30 years as an in-house PRO and journalist.
He joined Barclays Capital, the investment arm of Barclays, in August 2001 from Chase Manhattan Bank, where he was head of comms and marketing.
Before that, Anderson was senior speechwriter and press officer at Citibank. He began his career as a journalist in the US before moving to the UK in 1998.
RBS this month announced six-month profits of £4.51bn, a 23 per cent jump in profits for the first half of the year.
The bank has mirrored the banking sector at large in profiting from increasing charges for customers' bad debts, with a five per cent rise in charges over the period.
A survey this month by Group 1 Software suggested Britain's big five stood to make profits of £112 per customer per year.
Anderson was unavailable for comment as PRWeek went to press.