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 Litigation – Real Estate. 

Leadership + Activities

  • Hennepin County Bar Association 
  • Minnesota State 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 

News + Articles

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...

When CAN You Speak to a Represented Party?

Barry O'Neil and Michelle Kuhl presented a webinar on June 12, 2020 through the Hennepin County Bar Association's Professionalism and Ethics Section on "When CAN You Speak to a Represented Party?"   Overview: Rule 4.2 of the Minnesota Professional Rules of...

Civil Litigation Q&A with Barry O’Neil:

What issues come up most in employment law litigation? [Transcript]   What rights do minority shareholders have in a shareholder dispute? [Transcript] What is the first thing a business should do if served with a commercial litigation lawsuit? [Transcript]  ...