Geoffrey Pleyers is an FNRS (Belgian Fund for National Research) researcher at the CriDIS (Centre for interdisciplinary research: democracy, institutions, subjectivity) and a professor at the Université Catholique de Louvain. He is President (2014-2018) of Research Committee 47 "Social classes and social movements" at the International Sociological Association.

He teaches the sociology of social movements and globalisation at the Université de Louvain and at EHESS. He has been a visiting professor at several universities in Latin America (Universidad Nacional de Colombia, Universidad de Chili, Universidad Alberto Hurtado (Santiago), Universidad Nacional Autónoma de México, Instituto de Estudos Sociais e Políticos in Rio, Pontifícia Universidade Católica do Rio de Janeiro, etc.).

He is the author (with Breno Bringel) of Open Movements. For a global and public sociology of social movements and of Alter-globalization. Becoming Actors in the Global Age (Cambridge: Polity). He has coordinated twelve journal issues or collective works including La consommation critique (Critical consumption) (Paris, DDB), Movimientos sociales. De lo local a lo global (Mexico, Anthropos), Mouvements sociaux. Quand le sujet devient acteur (Social movements. When the subject becomes actor) (Paris, Editions de la MSH).