John Q. Doyle is President and Chief Executive Officer of Marsh McLennan (NYSE: MMC), the world’s leading professional services firm in the areas of risk, strategy and people. Through Marsh McLennan’s market-leading brands—Marsh, Guy Carpenter, Mercer and Oliver Wyman—more than 85,000 colleagues provide services to clients in 130 countries, generating annual revenue of over $20 billion. Prior to his current role, John served as Group President and Chief Operating Officer, responsible for the strategy and operational objectives of Marsh McLennan’s four global businesses. He joined the firm in 2016 as President of Marsh, then led Marsh as President and CEO from 2017 to 2021.