The École nationale des ponts et chaussées is organizing the 26th edition of the annual ROADEF congress of the French Society for Operational Research and Decision Support, from February 26 to 28, 2025. The organizing committee includes researchers from the laboratories CERMICS and LVMT. This congress is the largest French-speaking event aimed at bringing together researchers from various laboratories in combinatorial optimization, operational research, and industrial engineering. The objective is to promote exchanges and collaborations between researchers and industry professionals, as well as to contribute to the training of young researchers. The conference will bring together 600 persons and will take place in the Coriolis and Carnot buildings.