Sauer joined Apache as manager of tax in August 1992. He was promoted to director in 1997. Prior to joining Apache, he was tax manager at Swift Energy Company and a manager in the tax practice of Arthur Andersen. A graduate of the University of North Dakota, Sauer is a certified public accountant and a member of the Houston Chapter of the Texas Society of CPAs and the American Institute of CPAs. He serves on the tax committee of the Domestic Petroleum Council.