David Waller serves as the Chief Innovation and Data Officer at Marsh McLennan since April 2025. Prior to this role, Waller was a Partner at Bain & Company for nearly a year, from June 2024 to March 2025. Waller's extensive experience at Oliver Wyman spanned over 13 years, where roles included Head of Data Science and Analytics at OW Labs, Partner in the Retail Practice, and Associate Partner. Waller holds a degree in Statistics and Data Mining from the Massachusetts Institute of Technology and an ABAB degree from Harvard University.
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