Outlining the ways in which global union federations relate to multinational companies through agreements and structured collaboration, this study features an in-depth case study of one such dealing with a major company. Exploring the previously unknown internal lives of the global union federations, this reference, which proposes ideas about how the organizations can strengthen their position internationally as well as their resource base, will be of interest to all those interested in the future of trade unionism, multinational companies, and corporate social responsibility.