Jean-Louis Le Moigne (mwaɲ; born 22 March 1931) is a French specialist in systems theory and constructivist epistemology. He is an alumnus from École Centrale Paris. Jean-Louis Le Moigne was born on 22 March 1931 in Casablanca, French Morocco. He is married to Maguy Le Moigne, and they have 3 children. ECP (École centrale Paris) Engineer (1955). Diplomas from ITP Harvard Business School and the MIT Sloan School of Management (1970–71). Industrial Career 1959–1971: Shell Group France: lubricant development; operational research; Informational Organization; Central Planning; Director of South-West Region, Logistics. Professor (1971–1997), later Emeritus Professor of Universities, (systems science, engineering of organizations science, ...), at l'Université d'Aix-Marseille III in Aix-en-Provence, France. Co-founder, in 1975, and later director (1988–1997) of GRASCE (Research Group on the Adaptation, the Systems, and the Complexity of the Economy), associated with the CNRS since its origin. Since 1997, associated members of this Group henceforth integrated with GREQAM, UMR CNRS Marseilles. Member of committees which compiled several international scientific reviews (system, Information, Decision, Organization) The biography that follows was realized from discussions that Jean-Louis Le Moigne granted during the year 1998 as part of the preparation for the publication of its "Mix" (a collective work realized in his honor, to which important authors contributed — among which are: Herbert Simon, Edgar Morin, Ernst von Glasersfeld, P. Tabatoni, H. Bartoli — that was published under the title Between Systemic & Complexity: Trailblazing, to the P. U. F. in 1999). Jean-Louis Le Moigne was born on 22 March 1931 in Casablanca; he is the eldest child of three children. His father, Emile Le Moigne, had embraced a career in engineering that led him to move to Morocco for a few years to contribute thereby building a hydraulic barrier that made him famous in the area and that was inaugurated after 1940.