Before joining WPP two years ago, Holland worked at Heidrick & Struggles as a search consultant, at Perot Systems as vice-president of financial services and as a general manager at British Telecom, where she headed a 225 strong sales and operations team.
Holland will also become a board member at Millward Brown.
Bob Meyers, Millward Brown group chief executive officer, said: "She has a wealth of experience across a variety of industries worldwide and will bring great benefits to our global team."
Holland, who will be based in the firm's Naperville, Illinois office, added: "My past two years at WPP gave me the opportunity to get to know Millward Brown and many of the professional team of people with whom I will be working."
Earlier this month, Millward Brown announced the promotion of Charles Foster as managing dirctor of its South Africa division. He was previously joint deputy manging director.
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