Before ascending to the bench, Judge Oldham served as General Counsel to Texas Governor Greg Abbott, where he advised the Governor on a range of issues under federal and state law and managed litigation in which the Governor was an interested party. Before that he served as Deputy Solicitor General for the State of Texas, where he represented Texas in federal courts across the country, including twice before the United States Supreme Court. Before moving to Texas, Judge Oldham was an attorney at Kellogg Hansen Todd Figel & Frederick in Washington, D.C. His practice focused on appellate litigation in federal courts of appeals throughout the country. Before entering private practice, Judge Oldham served as a law clerk to Justice Samuel A. Alito, Jr., at the Supreme Court of the United States and to Judge David B. Sentelle of the U.S. Court of Appeals for the District of Columbia Circuit. He also worked as an attorney-adviser in the Office of Legal Counsel at the U.S. Department of Justice from 2006 to 2008. Judge Oldham earned a B.A. from the University of Virginia with highest honors, a Truman Scholarship for graduate school, an M. Phil., first class (with distinction), from Cambridge University, and a J.D., magna cum laude, from Harvard Law School.