Gregory N. Heinen

Senior Counsel

Gregory N. Heinen

Senior Counsel

Gregory (Greg) Heinen is a business litigator clients choose as the point person for defending complex lawsuits spanning across jurisdictions. He has a broad litigation background but focuses on product liability, mass torts, and toxic torts.

Greg has years of experience working as national coordinating counsel to direct strategy for many types of mass litigation matters in state and federal courts at every stage — from filing the complaint through trial and beyond, as well as serving as regional or local counsel for lawsuits in Wisconsin and neighboring states. This includes matters in multidistrict litigation (MDLs) and other coordinated proceedings involving hundreds of plaintiffs. Greg helps clients design and implement efficient, consistent, and decisive strategy, and can also execute that strategy in the courtroom using his experience from hearings and trials in various state and federal courts.

Greg’s experience includes antitrust litigation matters, environmental disputes, real estate matters, contract disputes, and potential tort issues, including PFAs (“forever chemicals” such as PFOA and PFOS), pharmaceuticals and medical devices, and asbestos. In addition to many commercial disputes, Greg has experience both conducting internal investigations and providing antitrust-related compliance counseling, including for trade associations. Greg has also represented clients in several appellate matters and has argued before the 7th Circuit Court of Appeals.

Greg is a member of the Manufacturing Sector, its Sustainability and Product Stewardship Group, and the firm’s Product Liability Team. Greg’s clients include manufacturers and other companies across the country and international companies, including companies based in Japan.

Representative Experience

  • National counsel for a pharmaceutical wholesale distributor in nationwide litigation relating to the distribution of prescription opioid medications, including more than 1,000 cases brought by states, cities, counties, tribes, and private parties seeking recovery in connection with the opioid abuse crisis.
  • National coordinating counsel, regional counsel, and local counsel for various product manufacturers in asbestos litigation cases in state courts across the country.
  • National counsel for an equipment manufacturer in product liability lawsuits in courts across the country.

Awards and Recognition

  • Best Lawyers® Ones to Watch, Commercial Litigation and Alternative Dispute Resolution (2021-2024)
  • Wisconsin Super Lawyers® Rising Star Commercial Litigation (2018, 2019, 2021 – 2023)


  • Member, American Bar Association
  • Member, Eastern District of Wisconsin Bar Association
  • Member, Milwaukee Bar Association
    • Co-chair, Civil Litigation Section
  • Member, Defense Research Institute Product Liability Section
  • Graduate, Thomas E. Fairchild American Inn of Court (2018)

Community Involvement

  • Board member, Parenting Network
  • Past board president and member, Hope Street Ministry
04 January 2024 Health Care Law Today

Acetaminophen MDL: Judge Excludes All of Plaintiffs’ Causation Experts Pursuant to Newly-Amended FRE Rule 702

On December 1, 2023, amendments to Federal Rule of Evidence (FRE) 702 geared toward emphasizing and explaining the responsibility of the judge as a “gatekeeper” for expert testimony took effect.
15 December 2023 Manufacturing Industry Advisor

Unable to Individually Trace PFAS to Manufacturers, Sixth Circuit Dismisses PFAS Class Action

On November 27, the Sixth Circuit Court of Appeals held that a proposed class lacked standing to proceed with PFAS claims, denied of “one of the largest class actions in history,” and even worse, ordered dismissal of the case entirely.
16 November 2023 Honors and Awards

Foley Attorneys Named 2023 Wisconsin Super Lawyers and Rising Stars

Foley & Lardner LLP is pleased to announce that 18 of its attorneys were selected for inclusion in the 2023 Wisconsin Super Lawyers and Rising Stars lists.
16 October 2023 Dashboard Insights

The Importance of Risk Audits for PFAS in the Automotive Industry

The automotive industry continues to grow a record of sustainability, improving fuel efficiency and proliferating electric vehicles, and adopting eco-friendly manufacturing processes.
16 October 2023 Manufacturing Industry Advisor

How Companies Can Audit Insurance Policies to Determine PFAS Coverage

This is the tip of the iceberg when it comes to PFAS liability as litigation and regulations are just starting to gain momentum. More is certainly to come.
17 August 2023 Honors and Awards

Foley Attorneys Recognized in 2024 Best Lawyers in America

Foley & Lardner LLP proudly announced today that 236 of the firm’s attorneys across 20 U.S. offices have received recognition in the 2024 edition of The Best Lawyers in America©.