Mildenhall joins as the vice-president of global marketing. He will head the strategic and operational roll-out of its carbonated and non-carbonated drinks. He will report to the Coca-Cola chief creative officer, Esther Lee, and will relocate to Atlanta in January.
Mildenhall said: "I'm sad to be leaving, but the scale of the job and the creative talent of the Coca-Cola team was too much of a pull."
Andy Medd, the Mother partner, added: "He has been amazing for Mother in the short time he's been here, but it's a stellar opportunity."
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