Hannah Chanoine

O'Melveny & Myers LLP

Hannah Y. Chanoine focuses on defending and advising companies in a diverse range of class action matters in the trial and appellate courts. Hannah began her career clerking for the Hon. Sonia Sotomayor on the Second Circuit Court of Appeals, and then served as a trial attorney in the Department of Justice, Civil Division (Federal Programs Branch) through the Attorney General’s Honor’s Program.

Hannah received her JD from Columbia University School of Law, where she was twice named a James Kent Scholar for outstanding academic achievement. Hannah is currently member of the adjunct faculty at Columbia Law School, where she co-teaches a course on US Food Law and Policy.


  • Defending and advising consumer packaged goods companies in nationwide false advertising cases.  Hannah has represented leading manufacturers and retail distributors of whitening toothpaste, coconut water, pet food, household cleaners, flavored olive oil, Greek yogurt, personal care products, kombucha, baking products, probiotic baby food, juice beverages and many other consumer  products. Hannah counsels CPG clients up and down the supply chain on strategies for mitigating class action litigation risk during product and label development, and advises investors conducting due diligence on the class action litigation risk profiles posed by potential targets.
  • Defending leading HD television distributor in nationwide class action alleging deceptive marketing relating to energy efficiency.
  • Defending a major satellite radio broadcaster in class action lawsuit alleging over $1 billion in damages for violations of novel intellectual property rights.
  • Defending products manufacturer against class action claim based on novel tort theory seeking comprehensive injunctive relief valued at over $200 million.
  • Serving as counsel for trade associations and business oriented advocacy groups as amici curiae addressing cutting edge class action issues in federal courts of appeal and the U.S. Supreme Court.
  • Serving as legal strategy counsel for Fortune 200 consumer products company in 15 jury trials tried to verdict or mistrial, including individual and mass actions, each seeking millions of dollars in compensatory and/or punitive damages.
  • Defending Department of Interior against class action claims alleging hundreds of millions of dollars of damages for breached contracts.
  • Writing merits and amicus briefs addressing a broad range of substantive and evidentiary issues in state and federal appellate courts nationwide, including the US Supreme Court and state supreme courts, and arguing multiple times before the Second Circuit Court of Appeals.
  • Lead responsibility for defending federal agencies in federal and state courts nationwide, including the Treasury Department’s Office of Foreign Assets Control and the State Department’s Foreign Service.
  • Maintaining an active pro bono practice. Hannah has worked closely with the ACLU and other civil rights organizations on LGBT rights, including: filing a lawsuit in Wisconsin to vindicate the rights of more than 500 same-sex couples that had married following a federal court ruling striking down that state’s marriage ban, but where the state refused to recognize the marriages, successfully persuading the state to change their position; filing amicus briefs in two “refusal of service” cases in the Colorado and New York appellate courts, advocating for robust enforcement of those states’ anti-discrimination laws on behalf of LGBT couples who had been denied services because of their orientation; and filing amicus briefs in the US Supreme Court and the Eighth Circuit cases addressing marriage equality. Hannah recently served a three-year term appointment to the Second Circuit Court of Appeals’ Pro Bono Panel.


  • New York
  • Massachusetts
  • US Supreme Court
  • US District Court for the Southern and Eastern Districts of New York, Northern District of Florida, and Eastern District of Michigan
  • US Court of Appeals for the First, Second, Third, Seventh, Ninth, and Eleventh Circuits
  • United States Court of Federal Claims


  • Columbia Law School, JD, 2004; Winner: 2004 Columbia Law Review Publishable Notes Competition, James Kent Scholar (2002-2003 and 2003-2004)
  • Wellesley College, BA, magna cum laude, 1998; Economics, Phi Beta Kappa


  • Honorable Sonia Sotomayor, US Court of Appeals, Second Circuit


  • Federal Bar Council: Second Circuit Courts Committee, Inn of Court


Rate : $$$

What types of cases Attorney Hannah Chanoine & O'Melveny & Myers LLP can handle?
O'Melveny & Myers LLP can handle cases related to laws concerning Consumer Rights & Protection, Class Action. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is O'Melveny & Myers LLP located?
O'Melveny & Myers LLP is located at Times Square Tower, New York, NY 10036, USA. You can reach out to O'Melveny & Myers LLP using their phone line 212-326-2128. You can also check their website omm.com or email them at [email protected].
How much would it cost to hire O'Melveny & Myers LLP?
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O'Melveny & Myers LLP
New York 10036 NY US
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