Prior to joining Arent Fox, Christopher worked at the United States Department of Justice, Civil Division, National Courts Section. His prior experience included arguing numerous appeals before the United States Court of Appeals for the Federal Circuit, including Englewood Terrace Limited Partnership v. United States, Resource Conservation Group LLC v. United States I, and II, Boye et al v. United States, Armstrong v. Department of the Treasury I and II, and Council v. Office of Personnel Management. He also argued numerous motions to dismiss before the United States Court of Federal Claims, including Doe v. United States, AEY, Inc. v. United States, Hallmark Phoenix 3, LLC v. United States, Resource Conservation Group LLC v. United States, MED Trends, Inc. v. United States, and Boye et al. v. United States. He further wrote the brief filed with the United States Court of Appeals for the Fifth Circuit in Rothe Development Inc. v. United States Department of Defense and United States Department of the Air Force.

He also previously worked at a large international law firm specializing in antitrust and white-collar defense.

From 2007-2008, Christopher clerked for the Honorable Diane Sykes of the United States Court of Appeals for the Seventh Circuit.

Christopher is on the Executive Committee for the Corporations, Securities, and Antitrust Practice Group of the Federalist Society. He is also a member of the American Bar Association and the Federal Circuit Bar Association.

Christopher is fluent in German, Russian, and Latin. When not working, Christopher enjoys fencing and baseball. He is married and lives in Arlington, Virginia.