IÉSEG School of Management (Institut d'Économie Scientifique Et de Gestion, translated to "The Institute of Scientific Economics and Management") is a French grande école and graduate business school, established in 1964 in Lille, France.IÉSEG School of Management is a member of the Université Catholique de Lille consortium, the largest private university in France in terms of student population and endowment. The school has two campuses, one in Lille and one in Paris. IÉSEG holds the "Triple Crown" of international business school accreditations: EQUIS, AACSB, and AMBA, and is therefore considered part of a limited circle of the best business schools worldwide (less than 1% of business schools have this distinction).