Margaret H. "Peg" Warner

Margaret H. "Peg" Warner

Commercial Litigation Insurance Law Litigation - Insurance
Recognized in Best Attorney USA since 2008

About Margaret

Margaret H. "Peg" Warner: Experienced Litigation Attorney in Washington, D.C.

Peg Warner is a distinguished litigation attorney with extensive experience spanning over 30 jurisdictions across state and federal courts. Her legal career has encompassed a broad spectrum of practice areas including antitrust, commercial, class action, environmental, healthcare, insurance, mass tort, product liability, and reinsurance disputes.

Practice Areas

  • Commercial Litigation
  • Insurance Law
  • Litigation - Insurance

Peg Warner has successfully taken numerous cases to verdict or judgment before juries, judges, and arbitration tribunals. Many of her notable cases have involved high-profile public policy issues such as Agent Orange litigation from the 1980s, environmental and Superfund litigation concerning sites like Love Canal and the Hudson River in the 1990s, as well as recent controversies including sexual abuse, 9/11, antitrust, healthcare, ERISA, and COVID-19 cases.

Education & Credentials

  • B.S., Environmental Science, University of Notre Dame, 1985
  • J.D., Georgetown University Law Center, 1990

Peg Warner is admitted to practice in the United States. She has been recognized as a 'Recognized Attorney' by Best Attorney USA since 2008. Her distinguished career includes service at McDermott Will & Schulte.

Affiliations

  • McDermott Will & Schulte, Current Firm

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Reviews

4.6 / 5

39 Reviews

1,058 Profile Views

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Courtney Ernser

Jan 28, 2026

Exactly what I needed after my legal issue in Washington - Margaret H. "Peg" Warner was a lifesaver

I was skeptical about hiring a lawyer for my Commercial Litigation law issue in Washington, but Margaret H. "Peg" Warner changed my mind completely. They were professional, responsive, and most import...

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Randall Roob

Jan 28, 2026

A honest review of my experience with Margaret H. "Peg" Warner regarding a Commercial Litigation law matter

Going through a Commercial Litigation law dispute is something I wouldn't wish on anyone, but having Margaret H. "Peg" Warner by my side made it manageable. I was worried about the cost and the time i...

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Edward Von

Jan 28, 2026

Excellent legal representation provided by Margaret H. "Peg" Warner for my Commercial Litigation law case

If you need a Commercial Litigation law lawyer, Margaret H. "Peg" Warner is the one to call. Great job and very responsive team. They kept me in the loop and always had time to explain the details of...

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Keith Homenick

Jan 28, 2026

Top notch experts in Washington - Margaret H. "Peg" Warner is by far the best lawyer I've ever had

Super helpful and professional staff at Margaret H. "Peg" Warner's office. Thanks again for everything you did for me! It was a long journey, but you made it much easier with your constant support and...

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Ervin Mills

Jan 28, 2026

I was completely overwhelmed until I found Margaret H. "Peg" Warner for my Commercial Litigation law case

After my incident in Washington, I was bombarded with calls and paperwork I didn't understand. I reached out to Margaret H. "Peg" Warner for help with my Commercial Litigation law claim and it was the...