Yseulys Costes is a graduate of the Magisterium of Management Sciences and of the DEA of Marketing and Strategy from the University of Paris IX Dauphine. Researcher in interactive marketing, she graduated from Harvard Business School (United States) and teaches interactive marketing in several establishments (HEC, ESSEC, Paris IX Dauphine University).
Yseulys Costes has been Chairman and CEO and founder of 1000mercis since February 2000.
Author of numerous books and articles on the topics of on-line marketing and databases, she was also coordinator of the IAB France (Interactive Advertising Bureau) for two years.