David Zimmer is a partner in the firm’s Litigation Department, and a member of its Appellate Litigation practice. Mr. Zimmer focuses on appellate matters and complex commercial litigation, and has litigation experience in a wide range of areas, including administrative law, intellectual property, antitrust and consumer financial services. He has successfully argued cases in the U.S. Supreme Court and the U.S. Courts of Appeals for the Second and Ninth Circuits, and has drafted and contributed to briefs for cases before numerous other federal courts of appeals and district and state courts throughout the country. He maintains an active pro bono practice, focusing largely on briefing and arguing immigration cases in the courts of appeals. Prior to joining Goodwin in 2013, Mr. Zimmer clerked for Justice Elena Kagan of the U.S. Supreme Court, and Judge William A. Fletcher of the U.S. Court of Appeals for the Ninth Circuit.

Areas of Practice
Domaines D’Expertise





Since joining Goodwin, Mr. Zimmer has been involved in litigation matters in the U.S. Supreme Court, numerous federal courts of appeals and district courts, and California and Massachusetts state courts. His recent significant representations include:

  • Successfully representing a pro bono client before the U.S. Supreme Court, including drafting a successful petition for certiorari and merits briefs and arguing the case.
  • On behalf of a major banking client, co-authoring briefs persuading the U.S. Supreme Court to grant certiorari and vacate an adverse appellate decision concerning the scope of the Fair Housing Act.
  • Co-authoring winning briefs in a significant appeal in the Federal Circuit about the scope of “covered business method” review of patents by the Patent Trial and Appeal Board. Managing IP named the case one of 2016’s “Milestone Cases.”
  • On behalf of four nationwide mortgage lenders, co-authoring briefs persuading the Ninth Circuit to dismiss a False Claims Act lawsuit demanding a multi-billion-dollar recovery.
  • Co-authoring briefs persuading a California trial judge to grant judgment notwithstanding the verdict on a multi-million-dollar tort judgment against a mortgage lender, and appellate briefs persuading the California Court of Appeal to affirm the trial court’s decision.
  • Successfully briefing and arguing cases before the Second and Ninth Circuits on behalf of pro bono clients, convincing the courts to grant petitions for review from decisions of the Board of Immigration Appeals finding our clients removable.
Professional Experience

Mr. Zimmer previously served on the Board of Directors for La Raza Centro Legal, a nonprofit organization in San Francisco representing immigrants’ rights. Prior to joining Goodwin, Mr. Zimmer served as a law clerk to Justice Elena Kagan of the Supreme Court of the United States, and Judge William A. Fletcher of the U.S. Court of Appeals for the Ninth Circuit. He also previously worked as an associate at Keker & Van Nest.


While attending law school, Mr. Zimmer was an Articles Editor and the Forum Chair for the Harvard Law Review.

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J.D., 2010
Harvard Law School
(magna cum laude)
M.P.A/I.D., 2010
Harvard Kennedy School of Government
B.A., 2004
Harvard College
(magna cum laude)


2012 to 2013 U.S. Supreme Court, Honorable Elena Kagan
2010 to 2011 U.S. Court of Appeals for the Ninth Circuit, Honorable William A. Fletcher





U.S. Supreme Court
U.S. District Court for the Northern District of California
U.S. Court of Appeals for the First Circuit
U.S. Court of Appeals for the Second Circuit
U.S. Court of Appeals for the Ninth Circuit
U.S. Court of Appeals for the District of Columbia Circuit
U.S. Court of Appeals for the Federal Circuit
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German Translation
Our clients rely on us for world-class advisory services, counsel on complex transactional work and high-stakes litigation. Specializing in matters involving the financial, life sciences, private equity, real estate, and technology industries, we use a collaborative, cross-disciplinary approach to resolve our clients’ most challenging issues. To find out more, please contact us.
Unsere Kunden verlassen sich auf uns für erstklassige Beratungsdienste, beraten über komplexe Transaktionsarbeiten und High-Stakes-Prozesse. Spezialisiert auf Angelegenheiten der Finanz-, Life-Sciences-, Private-Equity-, Immobilien-und Technologie-Industrie, verwenden wir eine kooperative, interdisziplinäre Ansatz zur Lösung unserer Kunden am schwierigsten Fragen. Um mehr zu erfahren, kontaktieren Sie uns bitte.

Nos équipes interviennent aux côtés de nos clients, industriels, fonds d’investissement, startups, institutions financières et dirigeants, dans le cadre de transactions et de contentieux complexes, et apportent des conseils de tout premier plan dans les secteurs financiers, des Sciences de la Vie, du Private Equity, de l’immobilier et des technologies. Nous traitons les dossiers juridiques de manière intègre, ingénieuse, souple et audacieuse pour répondre efficacement aux enjeux propres à chacun de nos clients, quels que soient la taille de l’opération et le secteur d’activité. Pour en savoir plus, contactez-nous.


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