John Lewis

John Lewis is an Operating Partner at Madison Dearborn Partners (MDP), where he oversees the strategy behind investments in Information Services, Data and Analytics businesses. The initial thesis yielded a multi-acquisition strategy in the Customer Experience Software and Analytics space and specifically in support of Salt Lake City-based InMoment. John is the Executive Chairman of InMoment while continuing to lead MDP efforts into broader Data and Software investments.

Before joining MDP, John served as Global President of Nielsen Holdings PLC, where he oversaw the Global “Buy” business and the ex-U.S. “Watch” business, which comprised approximately two-thirds of Nielsen's $6 billion of revenue. During his time at Nielsen, John ran the North American “Buy” business, and both the Latin American “Buy” and “Watch” businesses, leading each of these segments to both accelerated revenue growth and enhanced profitability. He also completed and successfully integrated more than 10 strategic acquisitions.

Prior to Nielsen, John was CEO of Knowledge Networks, a venture capital-backed start-up where he succeeded the founding CEO and led its transformation into a more differentiated provider of specialized market research. John also held an earlier role at Nielsen, where he was the Chief Marketing Officer and the #2 executive in the North American business turnaround from 1995-1999. Prior to his career in information services, John led the Consumer Products division at The NutraSweet Company.

John received his B.A. at Princeton University and an M.B.A. from Northwestern University Kellogg School of Management.