Chaffey joins from TBWA\London, where she was the managing partner on its Masterfoods account.
This follows Unilever's decision last December to move its £8 million pan-European Surf account out of Lowe and into Bartle Bogle Hegarty. More recently, Unilever's Flora, a global Lowe account, also decided to review.
Chaffey, who before taking on Masterfoods worked on Procter & Gamble at a variety of agencies, is replacing Pierre-Emmanuel Maire and is due to start at the beginning of next week.
Meanwhile, TBWA has hired Lowe's David Goring-Morris to run its Whiskas account across Europe. At Lowe, Goring-Morris was responsible for HSBC in the UK and Johnson & Johnson across Europe. He was also the general manager of Lowe & Partners, involved in co-ordinating the group companies.