The Public Territorial Establishment Grand Paris Sud Est Avenir (GPSEA), within the framework of its competence in economic development, supports the creation and takeover of companies in its territory, particularly around identified economic sectors (health, digital and technological innovation, agri-food, circular economy) organized around structuring equipment. GPSEA wants to develop assistance for project leaders, especially audiences who are far from entrepreneurship support schemes. Objectives: Strengthen the internal engineering at GPSEA (animation and coordination in the detection of projects in the aforementioned sectors). Call on a specialized service provider for reinforced and tailor-made support for project leaders and companies under 3 years old. This project is a continuation of two support phases carried out by GPSEA (which received ESF support under the 2014-2020 programming). The operation concerns the 16 cities of GPSEA: Alfortville, Boissy-Saint-Léger, Bonneuil-sur-Marne, Chennevières-sur-Marne, Créteil, La Queue-en-Brie, Le Plessis-Trévise, Limeil-Brévannes, Mandres-les-Roses, Marolles-en-Brie, Noiseau, Ormesson-sur-Marne, Périgny-sur-Yerres, Santeny, Sucy-en-Brie, Villecresnes. The operation is aimed at entrepreneurs who are planning to set up a business: - Job seekers - Inactive - Young people - Women - Managers of post-creation structures