During her time at JWT, Donald was a senior producer, before being promoted to the deputy head of TV in November last year in a reshuffle as a result of the departure of the agency's head of TV, Nigel Foster. She previously worked in TV production companies such as Stink, Gorgeous and Rogue.
Zoe Bell, the head of TV at Mother, said: "Clare is someone we have admired for a long time. In 2006, we have put on so much new business that we can now offer her so much creative opportunity, which we are all sure she will run brilliantly with." Donald is due to join the agency in January.