Accounting is a manifestation of several important environmental factors within a country, including economic, educational and political, and, as such, is evolutionary in accordance with those changing social structures. Because of the major impact that international accounting has had on countries' internal accounting systems, it is important to examine the contributions made by leaders within the profession. For over the past four decades one of the most influential leaders in the field of international accounting has been Dr. Gerhard G. Mueller. This article provides information on Dr. Mueller's family, educational, and career background and discusses his contributions in the field of international accounting.