Veolia Environnement is the world leader in environmental solutions with over 300 000 employees worldwide. The company supplies water, collects and treats wastewater, manages energy systems, collects, treats and recycles wastes, and manages public transportation and freight services. Veolia Environnement Recherche & Innovation (VERI), created in 2007, carries out the company’s research in its four fields of activity (water, waste management, energy and transportation). The 800 people (400 researchers, 400 field developers) located in 4 main research centres around Paris build and run experiments, thanks to 100 pilot testing facilities. Veolia Environnement’s research challenges are derived from the fundamental issues of today’s world, in particular demographic pressure (scarcity of resources such as water, energy sources and arable land), urban pressure (with 60% of the population in cities in 2030, we need to improve the quality of life in the most industrialised cities, as well as the living conditions of the poorest people) and energy pressures (how to move toward production systems that are less destructive and more compatible with the ecological balance, how to organise the transition to oil-less economy). The research programs aim to enhance the quality of Veolia’s services, while at the same time lowering their cost, and seek solutions that match our determination to work towards sustainable environment management and protection of human health.