Hon. Fred I. Parker, U.S. Court of Appeals, Second Circuit


Duke University School of Law, J.D., cum laude, 2002

  • Senior Editor, Law and Contemporary Problems
  • Paul B. Williams Merit Scholarship

Georgetown University, B.A., magna cum laude, 1999

  • Alpha Sigma Lambda Honor Society
Photo of Catherine S. Duval

Catherine S. Duval


Catherine S. Duval is a skilled litigator who has handled both plaintiff and defense work in high-value civil litigation. She focuses her practice on professional liability litigation, and also consults clients facing congressional and government investigations.

Although she’s been described as a “top fixer” (by former Speaker of the House John Boehner), Kate prefers to consider herself a zealous, principled advocate for her clients, including:

  • multiple AmLaw 100 firms facing professional negligence claims for hundreds of millions of dollars;
  • a Flint emergency city manager responding to congressional investigation of the Flint, Michigan, water crisis;
  • publicly traded companies conducting internal investigations in response to a variety of alleged employee misconduct;
  • an environmental litigation law firm defending against investigations and litigation related to global warming, environmental groups, and ExxonMobil;
  • an international company bringing a billion dollar contract claim against a former business partner; and
  • an attorney (successfully) fighting potential disbarment for actions taken in the course of representing a client.

In the Obama Administration, Kate led teams of lawyers responsible for investigations and oversight-related matters at two agencies, first as counselor to the commissioner of the IRS and later at the U.S. Department of State.

In those positions, she dealt with congressional committees on investigations, including into the Benghazi attacks, the IRS 501(c)(4) nonprofit application process, and email issues. She also prepared State Department and IRS staff for congressional hearings and other testimony.

Kate first began private practice at Williams & Connolly LLP, where she represented companies and individuals in a range of litigation, including civil, professional liability, securities, and white collar matters. Before law school, Kate served as a legislative staffer for U.S. Senator James M. Jeffords (then-R-VT).

Kate teaches professional responsibility at Georgetown University Law Center as an adjunct professor. Her practice in professional liability and attorneys’ disciplinary matters is complemented by six years of service as a hearing committee member for the District of Columbia Court of Appeals Board of Professional Responsibility, where she helped resolve attorney ethics and discipline issues.

Mentioned & Quoted


Bar Admissions

Court Admissions

Academic Appointments

  • Adjunct Professor, Georgetown University Law Center

Professional Affiliations

  • Board Member, Law360 Legal Ethics Editorial Advisory Board, 2016
  • Member, Association of Professional Responsibility Lawyers, 2015
  • Member, Hearing Committee, District of Columbia Court of Appeals, Board of Professional Responsibility, 2009 - 2015