John C. Quinn



  • B.A., Yale University, 2007
  • J.D., Harvard University, 2010
    magna cum laude


  • Hon. John R. Padova, U.S. District Court for the Eastern District of Pennsylvania

Fellowships, Leaderships & Recognition

  • Board Member, Ali Forney Center
  • Best LGBTQ+ Lawyers Under 40, National LGBT Bar Association and Foundation, 2017
  • New York Super Lawyers
  • New York Metro Area's Outstanding Young Lawyers, Top Attorneys
  • Addison Brown Prize, Harvard Law School
  • Joseph H. Beale Prize, Harvard Law School
  • Symposium Co-Chair and Submissions Editor, International Law Journal
  • Student Attorney, Harvard Law School Criminal Justice Institute
  • Teaching Fellow, Harvard College

Bar and Court Admissions

  • U.S. District Court for the Southern District of New York and Eastern District of New York
  • U.S. Court of Appeals for the Second and Third Circuits
  • New York

John Quinn is a partner at Kaplan Hecker & Fink LLP. He represents companies, institutions, and individuals in high-profile civil litigation and leads the firm’s efforts in a number of progressive public interest matters.

John was one of the founders of Kaplan Hecker & Fink in 2017. Since the firm’s launch, John has navigated a prominent hotel developer through complex multi-jurisdictional litigation and arbitration proceedings; represented Airbnb and Uber in Fourth Amendment challenges to municipal data-sharing requirements; and defended Gigi Hadid, Jennifer Lopez, and Ariana Grande in copyright lawsuits brought by paparazzi. He advises a wide range of institutions from hedge funds to a prominent art estate on various litigation matters.

John also has led the firm’s efforts in a massive fraud case against President Trump and his businesses, worked on multiple amicus briefs filed in the United States Supreme Court in cases challenging actions by the Trump administration, and represented a student-led LGBTQ+ pride organization in Starkville, Mississippi. In Starkville, John led a successful constitutional challenge to the city’s denial of a parade permit—and then flew to Starkville to help lead the parade. John regularly argues in state and federal courts and has extensive experience managing large litigation matters, meeting with government agencies, and advising senior executives of major institutions.  

Prior to helping launch Kaplan Hecker & Fink, John spent six years in the litigation group at Sullivan & Cromwell LLP, where his practice included representing Microsoft in a multi-billion-dollar jury trial; taking and defending dozens of depositions of both fact and expert witnesses; representing a hedge fund in connection with well-publicized efforts to raise concerns about a global multi-level marketing company; and representing an international financial institution in a criminal investigation into corruption in international soccer broadcasting. 

John is a member of Kaplan Hecker & Fink’s diversity and inclusion committee and is deeply involved in the firm’s recruiting, training, and professional development programs. John is proud to serve as a member of the board of the Ali Forney Center, the largest LGBTQ+ youth homeless shelter and community center in the country. John has also been active in the mentoring of LGBTQ+ associates and law students and has invested substantial time coaching high school mock trial programs. 

John clerked for the Honorable John R. Padova in the United States District Court for the Eastern District of Pennsylvania in his hometown of Philadelphia. He is a magna cum laude graduate of Harvard Law School, where he was awarded the Joseph H. Beale Prize for excellence in Conflict of Laws and the Addison Brown Prize, a prize awarded biannually or annually for an outstanding essay relating to private international law or maritime law. During law school, John served as a Teaching Fellow at Harvard College for a course on constitutional law, assisted Iraqi refugees in need of priority resettlement, collaborated in the development of violence mitigation programs for Sudanese refugee youth in Cairo, and represented clients in criminal proceedings in Roxbury and Dorchester through the Harvard Criminal Justice Institute. John also won a national championship as a member of the Harvard Criminal Justice Institute trial team. John is a member of the Federal Bar Council, and an Honorary Overseas Member of the Commercial Bar Association of London.

Read about John C. Quinn in our Newsroom

Published on: September 29, 2020

Mary Trump Sues President and Family, Claiming Fraud of Millions

In her best-selling memoir, Mary L. Trump, President Trump’s niece, told a family story that detailed the ways in which she claims her relatives — the president among them — tricked, bullied and... Read More
Published on: June 25, 2020

Kaplan Hecker & Fink LLP Delivers Unanimous Win in the First Department for Airbnb

This afternoon, the First Department unanimously affirmed a lower court decision in favor of our client Airbnb. The decision upholds New York Supreme Court Judge Saliann Scarpulla’s April 2019 ruling... Read More
Published on: June 12, 2020

Airbnb, NYC Agree To Settle Customer Data Suit

The government of New York City agreed to revise an ordinance that requires the public collection of short-term rental company customer data in a settlement agreement announced Friday with Airbnb... Read More