How has Dow Chemical Company’s tax function gone from being described as a ‘black box’ by company leadership to saving millions of dollars and becoming an established strategic partner within the business in just four years? Marcelo Vieira, Dow’s Director of Tax Strategy and Global Tax Operations and Andrea Gronenthal, EY Americas Strategic Tax Transformation Leader, discuss how Dow has evolved into one of the few tax departments that enjoys a granular yet global view of its risks and opportunities. EY refers to the global organization, and may refer to one or more of the member firms of Ernst & Young Global Limited, each of which is a separate legal entity. Ernst & Young Global Limited, a UK company limited by guarantee, does not provide services to clients. The views of third parties set out in this publication are not necessarily the views of the global EY organization or its member firms. Moreover, they should be seen in the context of the time they were made.