Matthew Sinkman

Matthew Sinkman


Gibbons PC

Recognized since 2026

New York, New York

Practice Areas

Environmental Law

Litigation - Environmental

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Mr. Sinkman represents plaintiffs and defendants in Superfund and other litigation matters regarding the cleanup of hazardous waste sites. He also represents buyers, sellers, and developers of contaminated properties, including parties seeking qualification for tax credits and other benefits provided by New York State’s Brownfield Cleanup Program. Mr. Sinkman’s practice also includes assisting clients with a wide variety of environmental compliance matters.

Mr. Sinkman is a former Assistant Attorney General in the New York State Office of the Attorney General’s Environmental Protection Bureau. In that role, he represented New York State and its agencies in Superfund matters; litigation against the federal government and private parties seeking in excess of $50 million for PFAS contamination at 69 sites; litigation against an international organization seeking more than $40 million in flooding damages; and other environmental enforcement matters.

Prior to joining the Attorney General’s Office, Mr. Sinkman was in private practice in New York City.

Location
  • One Pennsylvania Plaza, 45th Floor Ste 4515
    New York, NY 10119-3701
Education
  • University of Michigan, B.A., graduated 2001
  • Boston University School of Law, J.D., graduated 2007
Bar Admissions
  • New Jersey, New Jersey State Bar Association, 2022
  • New York, New York State Bar Association, 2008
Affiliations
  • New York State Bar Association - Executive Committee, Environmental & Energy Law Section, 2019 – Present
  • New York State Bar Association - Co-Chair, Enforcement and Compliance Committee, Environmental & Energy Law Section, 2019 – Present
  • New York State Bar Association - Member, Global Climate Change Committee, Environmental & Energy Law Section
  • New York State Bar Association - Member, Hazardous Waste/Site Remediation Committee, Environmental & Energy Law Section
  • New York City Brownfield Partnership Board of Directors - Member
  • New York City Bar Association, International Human Rights Committee, 2016 – 2019 - Member
  • Earth Day Climate Change Symposia, 2020-2025, sponsored by the New York State Bar Association and New York City Bar Association - Co-Chair and Principal Organizer
Court Admissions
  • United States District Court for the District of New Jersey
  • United States District Court for the Western District of New York
  • United States District Court for the Southern District of New York
  • United States District Court for the Northern District of New York
  • United States District Court for the Eastern District of New York
State Clerkships
  • New York - Trial Courts

Gibbons PC
Headquarters: Newark, New Jersey

58 The Best Lawyers in America® awards

6 Best Lawyers: Ones to Watch® in America awards

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Recognized in The Best Lawyers in America® 2026 for work in:
  • Environmental Law
  • Litigation - Environmental
Awards:

Publications

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