--- title: "Gregory George Katsas | KnowJudges" canonical: "https://knowjudges.com/kyj/judge/gregory-george-katsas" page_type: "judge_profile" updated: "2026-10-07" --- # Gregory George Katsas U.S. Court of Appeals for the District of Columbia Circuit · U.S. Circuit Judge ## Profile - Court: U.S. Court of Appeals for the District of Columbia Circuit - State: National federal courts - Role: U.S. Circuit Judge - Service status: active - Last verified: 2026-07-25 ## Summary Official statewide and applicable court procedural guidance applies to this judge. ## Biography ### Professional career - Judge, Court of Appeals for the D.C. Circuit, 2017-present - assistant attorney general, Civil Division, 2008-2009 - U.S. Department of Justice roles (2001–2009): Assistant Attorney General for the Civil Division, Acting Associate Attorney General - acting associate attorney general, 2007-2008 - principal deputy associate attorney general, 2006-2008 - deputy assistant attorney general, Civil Division, 2001-2006 - Law Clerk, Supreme Court of the United States, 1991-1992 - Law clerk to Judge Edward R. Becker (3rd Circuit, 1989–1990) and to then-Judge Clarence Thomas (D.C. Circuit, 1990–1991), later to Justice Thomas on the U.S. Supreme Court (1991–1992) - Law Clerk, Court of Appeals for the D.C. Circuit, 1990-1991 - Law Clerk, Court of Appeals for the Third Circuit, 1989-1990 - American lawyer and jurist serving as a United States Circuit Judge on the U.S. Court of Appeals for the District of Columbia Circuit - Judge of the United States Court of Appeals for the D.C. Circuit ### Education - Harvard University — J.D. (1989) - cum laude, Harvard Law School, Executive Editor of the Harvard Law Review — J.D. (1989) - in Philosophy, cum laude, Princeton University — B.A. (1986) ### Additional information - Deputy assistant and deputy counsel to President Donald J. Trump, 2017-present - Deputy White House Counsel and Deputy Assistant to the President in the Trump administration (2017). - received his commission on December 8, 2017. - Private practice, Washington, D.C., 2009-2017 - Returned to Jones Day (2009–2017). - Private practice at Jones Day (Washington, D.C.) from 1992–2001, specializing in appellate and complex civil litigation; partner from 1999. - Born August 6, 1964, in Boston, Massachusetts. - Date of birth: 1964-01-01 - Before joining the bench, he argued over 75 appeals, including three in the U.S. Supreme Court, 13 in the D.C. Circuit, and cases in every other federal court of appeals. - The D.C. Circuit is one of 13 U.S. Courts of Appeals, serving as the intermediate appellate court for the District of Columbia and certain other jurisdictions. - Birth place: Boston, MA ## Before you appear - Read the judge-specific standing order first when one is listed. - Check the docket and case orders for requirements that supersede broader guidance. - Confirm current remote-access and courtroom technology arrangements before the proceeding. ## Courtroom Rules ### appellate oral argument Scope: courtwide In federal courts of appeals, oral argument is allowed unless a three-judge panel unanimously finds one of Rule 34's specified grounds for dispensing with it; the clerk provides the date, time, place, and time allocation. Evidence excerpt: Oral argument must be allowed in every case unless a panel of three judges who have examined the briefs and record unanimously agrees that oral argument is unnecessary [Federal Rule of Appellate Procedure 34, Oral Argument](https://www.uscourts.gov/forms-rules/current-rules-practice-procedure/federal-rules-appellate-procedure) Source checked: 2026-07-26 ## Sources - [Official profile](https://www.fjc.gov/node/4022736) - [Official roster](https://www.fjc.gov/node/4022736) - [Federal Judicial Center biography](https://www.fjc.gov/node/4022736) - [CourtListener judicial biographical directory](https://www.courtlistener.com/person/8588/gregory-george-katsas/) - [Federal Rule of Appellate Procedure 34, Oral Argument](https://www.uscourts.gov/forms-rules/current-rules-practice-procedure/federal-rules-appellate-procedure) - [CourtListener judicial biographical directory](https://www.courtlistener.com/person/8588/gregory-george-katsas/) - [Wikidata: Gregory G. Katsas](https://www.wikidata.org/wiki/Q38978885) ## JSON-LD ```json { "@context": "https://schema.org", "@graph": [ { "@type": "WebPage", "@id": "https://knowjudges.com/kyj/judge/gregory-george-katsas", "url": "https://knowjudges.com/kyj/judge/gregory-george-katsas", "name": "Gregory George Katsas | KnowJudges", "description": "Gregory George Katsas, U.S. Court of Appeals for the District of Columbia Circuit. 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