Aristide is co-founder of Metabolism of Cities and Senior Researcher at the Human-Environment Relations in Urban Systems laboratory of the Ecole Polytechnique Fédérale de Lausanne. Within his work he attempts to build bridges between the academia, public administrations and “circular” actors in order to accelerate cities’ transition towards a more circular economy and metabolism. During the last years, he has advised and has acted as a external consultant for a number of local, regional and international administration and organisations on the topics of urban metabolism and circular economy.