Barry O'Neil

Barry A. O’Neil

Areas of Practice: Professional Liability, Legal Malpractice, Attorney Discipline and Ethics, Accounting Malpractice, Commercial & Contract Disputes, Shareholder/Owner Disputes, Real Estate Litigation, Employment Litigation; Entertainment Litigation, Probate & Trust Disputes 

Office Location: Minneapolis, Minnesota 

Direct612.336.9342 / 

Barry A. O’Neil / Biography

Barry O’Neil is a trial attorney, who is certified as a Civil Trial Specialist by the Minnesota State Bar Association. He represents professionals in malpractice claims with an emphasis in legal and accounting malpractice. Mr. O’Neil’s practice also involves the resolution of complex commercial disputes, employment-related issues and insurance claims. His commercial litigation experience has included contract, shareholder, partnership and business competition disputes in both trial and arbitration settings. Mr. O’Neil is the chair of the firm’s Trials and Litigation Practice Group. 

Mr. O’Neil is a frequent lecturer on CLE topics including professional liability issues, trial practice and business litigation issues. He has repeatedly been selected for inclusion in Minnesota Super Lawyers; is rated AV Preeminent® for the highest level of professional excellence by Martindale-Hubbell; and is recognized in The Best Lawyers in America© for his work in the practice areas of Legal Malpractice Law – Defendants, Litigation – Real Estate, and Litigation – Intellectual Property.

Leadership + Activities

  • Minnesota State Bar Association (including Hennepin County Bar Association)
  • Federal Bar Association 
  • American Bar Association


  • “When CAN You Speak to a Represented Party?” HCBA, June 2020
  • “Legal Malpractice Actions and Ethics Issues Related to Bankruptcy Matters,” 2019 Bankruptcy Institute, Minnesota CLE, October 2019
  • “Legal Malpractice Issues: Plaintiff and Defendant Perspectives,” The Knowledge Group, January 2019

Published Articles

  • “Agent and Broker Liability,” Update to Fifth Edition of the Minnesota Insurance Law Deskbook, Minnesota CLE, July 2021


  • Gustavus Adolphus College, B.A., cum laude, 1986 
  • William Mitchell College of Law, J.D., cum laude, 1991 

Bar Admissions

  • Minnesota, 1991 
  • U.S. District Court, District of Minnesota, 1992 
  • U.S. District Court, Central District of Illinois, 1994 
  • U.S. District Court, Western District of Wisconsin, 1999 
  • U.S. Tax Court, 1999 
  • U.S. Court of Appeals, Eighth Circuit, 2003 
  • U.S. Supreme Court, 2005 

Awards + Certifications

News + Articles

Ten Lommen Abdo Attorneys Recognized as 2024 Best Lawyers®

Ten Lommen Abdo Attorneys Recognized as 2024 Best Lawyers®

We are thrilled to announce the outstanding Lommen Abdo attorneys who have earned the prestigious recognition of being named in the 2024 Edition of Best Lawyers. These accomplished legal professionals have demonstrated unwavering dedication, exceptional skills, and a...

List of Lommen Abdo’s Best Lawyers Unmasked

List of Lommen Abdo’s Best Lawyers Unmasked

Lommen Abdo is proud to have increased the number of its lawyers included in the latest edition of The Best Lawyers in America© – especially in the midst of a pandemic.  One additional Lommen Abdo attorney has been included in the 2021 edition of Best Lawyers: One to...