Under the new set-up, Tanqueray will not be directly replaced. Instead, the department will be split between three new client services directors - Peter Knowland, the head of new business, Judith Frame, a board account director responsible for Sainsbury's, and Ian Pearman, a board account director on BT.
At the same time, AMV's portfolio of accounts will be divided equally between the three, with each responsible for a third of the agency's billings.
Each group will be the size of a small- to medium-sized agency. Brands will be fixed within these new groups but people will be able to work across groups as and when necessary.
AMV is also preparing to ramp up its new-business resource. The agency's managing director, Farah Ramzan, said she was in talks with a number of internal candidates to take this forward.
The agency is also looking to increase its international efforts through its existing international services director, Martin Hummell.
Tanqueray has left AMV to join Wieden & Kennedy Amsterdam, where he will work on on the agency's Nike business.