Darci Darnell is the Global Head of the Customer Practice at Bain & Company, where she oversees global strategy and marketing solutions. A renowned expert on customer loyalty, she co-authored the book Winning on Purpose alongside Net Promoter System creator Fred Reichheld. Darnell is a principal architect of Net Promoter 3.0, introducing the ’earned growth rate’ to help organizations link customer advocacy directly to financial results and sustainable growth.
