This article offers a sociological understanding of intermediary NGOs in the modern world. In does so by drawing on certain epistemological insights of Marx and Weber, and this entails methodologies of both deconstruction and reconstruction. In arguing against a sociological behaviourism that pervades the NGO literature, the article conceptualises intermediary NGOs as a 'social form' embodying contradictory relations. For analytical purposes, the contradiction between 'the globa/' and 'the loca/' is brought to the fore. NGOs are immersed in processes of 'glocalisation'. More specifically, the social field of NGOs is marked by ambiguities and tensions, and NGOs seek to 'negotiate' and manoeuvre their way through this field by a variety of organisational practices. At times, these practices entail attempts at stabilising and simplifying the world and work of NGOs. It is concluded that, as a general trajectory, intermediary NGOs privilege the global moment, problematise the local moment and prioritise their own organisational sustain ability