JP Schnapper-Casteras

John Paul “JP” Schnapper-Casteras is the founder of Schnapper-Casteras PLLC,  where he advises frontier technology companies and public interest organizations on legal strategy, litigation, and public policy.  Clients include: a national civil rights group with over three million members; one of the nation’s largest 100 private foundations; a decentralized exchange platform; a technology research and data firm; and a network for open collaboration.

Previously, he served as Special Counsel for Appellate and Supreme Court Advocacy at the NAACP Legal Defense and Educational Fund (LDF), one of the nation’s premier public interest law firms. At LDF, he designed and co-authored numerous Supreme Court briefs on a variety of constitutional and statutory issues, including marriage equality, First Amendment law, higher education, voting rights, LGBTQ rights, employment discrimination, jury trials, and fair housing. Before that, JP practiced in the appellate group of Sidley Austin LLP, where he co-authored Supreme Court briefs involving trademark infringement, international trade, environmental contamination, and education.

JP has published on a broad range of legal and policy topics in outlets such as The Washington PostPoliticoRichmond Times-DispatchPhiladelphia Inquirer, Seattle Post-IntelligencerSCOTUS BlogTake Care Blog,  Defense One, First Amendment WatchWorld Affairs JournalHarvard Law Review online, Harvard Kennedy School Review, Criminal Law Bulletin, and Cornell Journal of Law and Public Policy.  He has been profiled by the National Law Journal and is regularly quoted in outlets like National Public Radio, The Boston Globe, Christian Science Monitor, New York Magazine, The Hill, Dallas Morning News, San Jose Mercury News, Al Jazeera America, and Above the Law.

JP is Member of the Edward Coke Appellate Inn of Court and was selected to serve on American Bar Association’s Standing Committee on the Federal Judiciary (Practitioners’ Reading Group). Since 2012, JP has served as a fellow at Georgetown University Law Center and in 2013 was named as one of the “Top 99 Foreign Policy Leaders Under 33” by Diplomatic Courier magazine. He conducted extensive research at Stanford and Harvard universities, including as a predoctoral fellow at the Center for International Security and Cooperation.  His board service includes Stanford University (as a graduate student); the American University of Iraq (Trustee Emeritus); Lantos Foundation for Human Rights and Justice (Trustee); and Young Professionals in Foreign Policy (former Board Member).

JP received his J.D. with Pro Bono Distinction from Stanford Law School, where he won the Walter J. Cummings Award for Best Brief as a Finalist in the Kirkwood Moot Court Competition, was a member of the Supreme Court Litigation Clinic, and served as Managing Editor of the Stanford Law & Policy Review. He holds an M.P.P. from the Harvard Kennedy School and an M.A. in Sociology and B.A. with honors in Political Science from Stanford University. As an undergraduate, he served as Editor-in-Chief of the Stanford Scientific Review and founded the first student exchange program in postwar Iraq.



  • Stanford Law School, J.D., 2009 (with Pro Bono Distinction)
  • Harvard Kennedy School, M.P.P., 2009 (joint degree)
  • Stanford University, M.A., 2005 (co-terminal masters in four years)
  • Stanford University, B.A., 2005 (with Honors)


  • Honorable Roger L. Gregory of the U.S. Court of Appeals for the Fourth Circuit (2010-2011)
  • Honorable Scott W. Stucky of the U.S. Court of Appeals for the Armed Forces (2009-2010)


  • Supreme Court of the United States
  • U.S. Court of Appeals, 1st Circuit
  • U.S. Court of Appeals, 2nd Circuit
  • U.S. Court of Appeals, 3rd Circuit
  • U.S. Court of Appeals, 4th Circuit
  • U.S. Court of Appeals, 5th Circuit
  • U.S. Court of Appeals, 6th Circuit
  • U.S. Court of Appeals, 7th Circuit
  • U.S. Court of Appeals, 8th Circuit
  • U.S. Court of Appeals, 9th Circuit
  • U.S. Court of Appeals, 10th Circuit
  • U.S. Court of Appeals, 11th Circuit
  • U.S. Court of Appeals, D.C. Circuit
  • U.S. Court of Appeals, Armed Forces
  • District of Columbia
  • New York


Select computer science experience:

  • Editor-in-Chief, Stanford Scientific Review
  • Researcher on recovery-oriented computing and interactive workspaces for Stanford Computer Science Department
  • Developer of accessibility architecture and toolkits for various open source platforms and software projects (e.g., KDE Accessibility Project; GNU Network Object Model Environment); recipient of Linux Fund grant
  • Technical publications and presentations at the National Institute of Standards and Technology; Joint Berkeley-Stanford Computing Retreat; Stanford CS196 Course; Linux Weekly News; and Linux Gazette
  • Invited expert for Protocols and Formats Working Group, World Wide Web Consortium (W3C)

Select speaking engagements:

  • Harvard Law School, Criminal Justice Appellate Clinic, Jan. 5, 2018
  • NYU School of Law, Racial Equity Strategies Clinic, Feb. 16, 2017 and Feb. 11, 2016
  • Georgetown Appellate Litigation Clinic, Feb. 1, 2017
  • Regular participant in moots at Georgetown Supreme Court Institute and at Howard University School of Law
  • American Bar Association Section of Civil Rights and Social Justice, “Supreme Court Overview,” Jan. 24, 2017
  • CSPAN-broadcast debate on “Religious Freedom and Anti-Discrimination Law,” Dec. 4, 2017
  • Training Program of the U.S. Court of Appeals for the Armed Forces, Mar. 2-3, 2016
  • American Law Institute, “The Future of Affirmative Action and Diversity Efforts,” July 18, 2013