Jacob S. Sonner

Partner Buffalo
Jacob Sonner

Jacob is an experienced business litigator that represents his clients in actions throughout New York state courts and in federal district and bankruptcy courts across the country.

Jacob’s expertise includes commercial disputes, breach of contract matters, business torts and construction litigation. He also focuses his practice on product liability defense, eminent domain litigation, and real property valuation and tax assessment litigation.

Outside the courtroom, Jacob manages complex, high-volume discovery matters. He also regularly assists clients in site inspections and forensic product testing during, or prior to, litigation.

Jacob has been recognized as an Upstate New York Super Lawyers® Rising Star, 2018-2022 and named to Best Lawyers: Ones to Watch. He is also an honoree of the New York State Bar Association Empire State Counsel® Program for Pro Bono Work in 2021.


Honors & Awards

  • Honoree of the New York State Bar Association Empire State Counsel® Program for Pro Bono Work, 2021
  • Named Upstate New York Super Lawyers® Rising Star, 2018-2023
  • Named to Best Lawyers: Ones to Watch in America®

Education & Admissions

  • State University of New York at Buffalo Law School, J.D., Order of the Coif, 2014
  • St. Bonaventure University, B.A., 2011
Admitted to Practice
  • New York
  • U.S. District Court, Western District of New York
  • U.S. Bankruptcy Court, Western District of New York


Representative Matters
  • Part of a select litigation team that prosecuted a breach of guarantee claim to a $53 million jury verdict on behalf of large inventory finance lender.
  • Defended an industrial equipment manufacturer against claims of negligent safety training which resulted in order dismissing all claims.
  • Litigated fraud and conversion claims on behalf of a secured creditor in two separate actions in U.S. District Courts for the Northern and Southern Districts of Indiana, resulting in prejudgment orders awarding the client possession of its secured collateral and, ultimately, orders granting judgments against the defendants.
  • Defended a Western New York company against claims brought by the New York State Thruway Authority for alleged roadway damages.
  • Represented consumer products manufacturer at site inspections and forensic product tests across the country, resulting in discontinuance of claims.

Activities & Professional Associations

Present Activities

  • Boys & Girls Clubs of Orchard Park – Boston, Board of Directors

Past Activities

  • Intern Law Clerk, Honorable Frederick J. Marshall, New York State Supreme Court, 2013
  • Buffalo Law Review, Associate/Executive Publications Editor, 2012-2013

Professional Associations

  • American Bar Association
    • Litigation Section
    • Young Lawyers Division
  • New York State Bar Association

Articles & Publications


  • Author, “A Crack in the Floodgates: New York’s Fourth Department, the PLCAA, and the Future of Gun Litigation after Williams v. Beemiller,” 61 Buff. L. Rev. 969, Buffalo Law Review, August 2013