This chapter translates the concept of 'co-production' for the study of the making of expertise in global governance. While we know that expertise, the knowledge considered relevant and authoritative for governing, is not produced 'outside of politics', the chapter shows that the co-production of knowledge and politics is not only an abstract idea; it takes place through the operation of specific logics and identifiable conduits. The logic of 'orchestration', which depicts the asymmetries and hierarchies which delineate what knowledge counts, the logic of 'ideational alignment', by which common understandings are incrementally stabilized, and the logic of 'calibration', which occurs when non-conforming views self-adjust to dominant expectations, all operate to entangle knowledge and politics, thus shaping what comes to count as expertise. These logics operate through the concrete workings of people, sites, and knowledge artefacts in global governance. The circulation of people, through the operation of networks across spheres and organizations, the role of boundary sites, which sediment certain problematizations beyond the role of actors, and the materialization of expertise into knowledge artefacts, such as documents, models, or data, which then become rehearsed, cited, and made conform, all render possible, sustain, and sediment distinct kinds of entanglements between knowledge and politics.