Klineberg M. Geoffrey

Geoffrey M. Klineberg


  • Yale Law School, J.D., 1990
    • Articles Editor, Yale Law Journal, 1989-1990
  • Oxford University, Balliol College, M.Phil. in International Relations, with Distinction, 1987
  • Princeton University, Princeton School of Public and International Affairs, A.B., magna cum laude, 1985
    • Phi Beta Kappa


  • Law Clerk, Justice Harry A. Blackmun, U.S. Supreme Court, 1992-1993
  • Law Clerk, Judge Patricia M. Wald, U.S. Court of Appeals, District of Columbia Circuit, 1991-1992
  • Law Clerk, Judge José A. Cabranes, U.S. District Court, District of Connecticut, 1990-1991

Government Service

  • Counselor on International Law, Office of the Legal Adviser, U.S. Department of State, 2012-2013
  • Special Assistant to the Deputy Attorney General, U.S. Department of Justice, 1993-1995


  • 1994, District of Columbia
  • 1998, U.S. Supreme Court

Geoffrey M. Klineberg practices primarily in the areas of administrative law and appellate litigation, representing clients in matters before the Federal Communications Commission, as well as before the United States Supreme Court and various federal district and appellate courts.  More recently, he has represented clients in several high-profile antitrust litigation matters against both the Department of Justice and the Federal Trade Commission.  

Geoff joined the firm in August 1995 and has been a partner since January 1998.  From June 2020 to June 2021, he served as the 49th President of the D.C. Bar.

Geoff also regularly advises clients on the applicability of the Rules of Professional Conduct, having served for seven years on the D.C. Bar Legal Ethics Committee, completing the last three years as Chair.  He currently serves as the Chair of both the U.S. District Court Committee on Grievances and the D.C. Court of Appeals Committee on Unauthorized Practice of Law.

In August 2013, Geoff returned to the firm after a one-year leave of absence as the Counselor on International Law in the Office of the Legal Adviser at the U.S. Department of State, providing advice on a wide variety of litigation issues and working with the Department of Justice and other governmental agencies to formulate the litigation position of the United States.  Since returning to the firm, he has represented clients on matters relating to foreign official immunity, foreign sovereign immunity, and international comity.

Other Experience

  • Chair, D.C. Court of Appeals Committee on Unauthorized Practice of Law, 2023-present
    • Member, 2015-2023
  • Chair, U.S. District Court for the District of Columbia Committee on Grievances, 2022-2023
    • Vice Chair, 2020-2021
    • Member, 2018-2019
  • President, D.C. Bar, 2020-2021
    • President-Elect, 2019-2020
    • Immediate Past President, 2021-2022
  • Member, D.C. Bar Pro Bono Task Force, 2018-2020
  • Chair, D.C. Bar Global Legal Practice Committee, 2018-2019
  • Member, D.C. Bar Global Legal Practice Task Force, 2014-2018
  • Member, Board of Directors, The Historical Society of the District of Columbia Circuit, 2011-2017
  • Chair, D.C. Bar Clients’ Security Fund Study Committee, 2010-2012
  • Chair, D.C. Bar Legal Ethics Committee, 2005-2008
    • Vice Chair, 2003-2005
    • Member, 2001-2003
  • Member, Board of Directors, The American Constitution Society for Law and Policy, 2001-2004

Noteworthy Representations

  • Federal Trade Commission v. Meta Platforms, Inc., Mark Zuckerberg, and Within Unlimited, Inc., No. 3:22-cv-04325 (N.D. Cal. 2023).  Defeated a request by the U.S. Federal Trade Commission to preliminarily enjoin Meta’s acquisition of Within Unlimited, Inc.  After the district court ruled in favor of Meta, the FTC abandoned its parallel administrative complaint in the administrative home court.
  • Successfully defended AT&T in a formal complaint proceeding before the Federal Communications Commission and before the Eleventh Circuit, which dismissed the petition for review and upheld the FCC’s determination that the complainant’s claims had been released.  Saturn Telecomm. Servs., Inc. v. FCC, 632 F. App’x 591 (11th Cir. 2016) (per curiam).
  • Served as counsel of record for respondent AT&T Inc. in a U.S. Supreme Court case presenting the question whether Exemption 7(C) of the Freedom of Information Act, which protects from disclosure any law enforcement record the disclosure of which “could reasonably be expected to constitute an unwarranted invasion of personal privacy,” protects the privacy interests of a corporation.  FCC v. AT&T Inc., 562 U.S. 397 (2011).


  • Shifting Tides in the Business of Law, Washington Lawyer, at 6 (May/June 2021)
  • “Can Boys Be Lawyers, Too?,” Washington Lawyer, at 6 (Mar/Apr 2021)
  • Letting the Bar’s Communities Speak, Washington Lawyer, at 6 (Jan/Feb 2021)
  • Reexamining the Bar Exam, Washington Lawyer, at 6 (Nov/Dec 2020)
  • Mater Artium Necessitas, Washington Lawyer, at 6 (Sept/Oct 2020)
  • Adapting to Our New Reality, Washington Lawyer, at 6 (July/Aug 2020)
  • Co-Author (with Janet Reno), What Would Jackson Do?  Some Old Advice for the New Attorney General, 2 Harv. L. & Pol’y Rev. 197 (2008)