Although there has been some growing recognition of the role of private actors in international environmental regimes, little attention has been paid to the role of the private sector at the science–policy interface. Because the automobile industry plays a crucial role in mitigation of greenhouse gases, successful policy requires not just the assent but the active cooperation of this sector. Such cooperation, however, requires some institutional acceptance that climate change is indeed a significant risk. In this article, the authors look at the early stages of the automobile industry’s engagement with the discourse on climate change. The authors focus, in particular, on the role of corporate scientists in two U.S. automobile companies in translating this discourse. Acting as boundary spanners and institutional entrepreneurs, these individuals influenced both corporate perceptions of and responses to climate change science