Danielle Mazzeo is an Associate in the New York office of Labaton Keller Sucharow LLP. Mazzeo focuses her practice on representing consumers in cybersecurity and data privacy litigation, as well as litigating securities fraud class actions on behalf of institutional investors.
Mazzeo is actively involved in litigating cases against Amazon, PowerSchool, and Hain Celestial among others.
Most notably, Mazzeo was a key team member in securing the historic jury verdict in a landmark data privacy case against tech giant Meta Platforms Inc., finding Meta liable for its role in the unauthorized collection and commercial use of highly personal health data from third-party app Flo Health. This is one of the first cases where a jury has held a major technology company accountable for its handling of consumer health information.
Lawdragon Honors
| Honor | Year | Practice |
|---|---|---|
| The 2025 Lawdragon 500 X – The Next Generation | 2025 | Cybersecurity, Data Privacy, Securities Litigation |
In addition to her work in consumer protection and data privacy litigation, Mazzeo was part of the litigation teams that secured significant investor recoveries in Boston Retirement System v. Uber Technologies, Inc. ($200 million settlement) and In re Allstate Corporation Securities Litigation ($90 million settlement).
Prior to joining the Firm, Mazzeo was a Judicial Extern to Justice Andrea Masley in the New York State Supreme Court, Commercial Division.
Mazzeo was also a Nassau County Bar Association Volunteer for the Mortgage Foreclosure Pro Bono Project where she assisted attorneys in gathering client information and prepared for settlement conferences.
Heavily involved in the Federal Bar Council, Mazzeo served as the 2024 Event Co-Chair for the Fall Bench and Bar Retreat, an event that fosters a dynamic and collaborative environment for legal professionals to enhance their practice through insightful panel discussions and networking with members of both the bench and the bar.
Mazzeo is a member of The Sedona Conference Working Group 11.