Nicolas Grojnowski is a consultant specializing in waste management and circular economy at Inddigo since March 2023, providing support to local authorities in the implementation of extended producer responsibility schemes and validating waste cost matrices using the ComptaCoût® method. Previously, Nicolas worked as a campaign coordinator at Zero Waste France, where responsibilities included organizing awareness campaigns on waste and resource use. Additional experience includes serving as an assistant in sustainable development at Vallée Sud - Grand Paris, supporting the execution of the territorial climate-air-energy plan, and assisting the president's office at CY Cergy Paris Université, focusing on integrating sustainable development goals and strategic project oversight. Nicolas holds a Master’s degree in Governance of Transition, Ecology, and Societies from AgroParisTech and a Master’s degree in Political Science and Government from Sciences Po Saint-Germain-en-Laye.