• New York University School of Law, J.D., 2003
  • University of Florida, B.A., with Honors, 2000
  • State Bar of New York
  • U.S. District Court for the Eastern District of New York
  • U.S. District Court for the Southern District of New York

Zachary W. Mazin tries complex civil cases arising out of business disputes, structured financial products, and governmental investigations. Currently, he represents trustees of residential mortgage-backed securitizations in actions seeking to recover billions of dollars from the investment banks who packaged and sold defective mortgage loans to unwitting investors. His RMBS work has earned him a Chambers USA ranking in Securities: Institutional Plaintiffs: Mainly RMBS Litigation (2026), along with spots on Lawdragon’s “500 Leading Litigators in America” list (2022-2026), “500 Leading Plaintiff Financial Lawyers” list (2019-2023), Benchmark Litigation’s “Under 40 Hot List” (2016-2019) and “Future Star” list (2018-2024).

Zach is also an advisor to clients working in the business of sports. He counsels and represents team executives, players, and football agents.

Zach began his career representing a major international bank in the Enron securities class action litigation. Zach and his team obtained a dismissal of the bank from the Enron investors’ lawsuit that wrongly sought to hold it liable for the losses caused by Enron’s fraudulent activity. He also represented the bank in a dispute over its obligation to pay on a $517 million Enron-related credit default swap.

Zach also handles disputes arising out of commercial contracts, business torts, and commercial leases.

Before joining Glenn Agre Bergman & Fuentes, Zach was a principal at McKool Smith, P.C.

  • U.S. Bank and HSBC, each in their capacity as Trustee of certain RMBS trusts, in actions seeking to hold various Wall Steet Banks contractually accountable for their misrepresentations made in the course of packaging and selling tens of thousands of mortgage loans to unsuspecting investors.
  • The Blockchain Recovery Investment Consortium, in its capacity as Complex Asset Recovery Manager and Litigation Administrator for the Celsius Network bankruptcy estate, in support of its efforts to pursue recoveries from malfeasant pre-petition professionals on behalf Celsius’s creditors.
  • A significant private credit fund in a dispute with an administrative and collateral agent, pursuant to a $700,000,000 Credit Agreement, arising out of the improper disclosure of material non-public information to the lender.
  • Two highly successful NFL agents in a dispute with their former employer.  After assisting the agents in negotiating their departure, they now run their own agency where they represent All-Pro’s, Pro Bowlers, and Super Bowl champions.
  • What Endless Tolling of Claims Means for NY Litigation, Law360 (May 6, 2022)
  • A case for experienced legal counsel on COVID-Era financial markets and products litigation, Westlaw (Sep. 25, 2020)
  • Chambers USA, Securities: Institutional Plaintiffs: Mainly RMBS Litigation, 2026 (see here).
  • Legal 500, New York City Elite: Commercial Disputes, 2026
  • Lawdragon, 500 Leading Litigators in America, 2022; 2024–26
  • Lawdragon, 500 Leading Plaintiff Financial Lawyers, 2019–26
  • Benchmark Litigation, Future Star, 2018–26
  • Benchmark Litigation, Under 40 Hot List, 2016–19