Biography

Daniel R. Sonneborn is a Director in the firm's Litigation Practice Group, working primarily from the firm’s Boston office. A negotiator and litigator, his clients include those in professional services and regulated industries like transportation, insurance, health care, financial services, and construction. Dan’s counsel ranges in focus from professional liability and risk mitigation to multi-jurisdictional class actions. He has developed a particular interest in transportation law, and represents motor carriers, brokers, freight forwarders, and insurance companies in transportation-related matters and litigation, including cargo loss and damage, warehousing, contractual issues, and employment matters.

Despite his upbringing in a family of medical providers, Dan found his professional path in law school, where he was able to combine his generational connection to medicine with his passion for problem-solving. He served as Managing Editor of Suffolk Law’s Journal of Health and Biomedical Law, and continues to advise healthcare professionals to this day. His deep New England roots are reflected in his experience appearing in state and federal courts in Massachusetts, Maine, and New Hampshire.  

Dan lives in Medford, Massachusetts, with his wife and two children.

Professional Activities

  • Massachusetts Defense Lawyers Association
  • Transportation Lawyers Association
  • Conference of Freight Counsel

Honors & Recognition

  • Massachusetts Super Lawyers Rising Star, Transportation/Maritime – 2016 - 2021

Civic and Charitable Activities

  • Coach, Medford Youth Hockey and Baseball

Publications

  • Co-author, Introduction, A Practical Guide to Understanding RSA 358-A in New Hampshire (MCLE New England, 1st Edition, 2014).

Firm Highlights

Event

Solving Problems During the Construction Process

Understanding the variety of construction contracts available and the specifics of each is essential for protecting your project and legal interests. At this interactive Half Moon Seminars webinar, Preti Flaherty attorney John Cronan will...

Publication

Veto Day and Final Day of the 131st Legislature

The Legislature convened on Friday, May 10 th for Veto Day to take action on the six bills objected to by the Governor. As expected, all six vetoes were sustained by lawmakers allowing  Governor...

News

10 Preti Attorneys, 6 Practice Groups Honored in National Rankings

Ten Preti Flaherty attorneys and six practice groups have been selected by Chambers USA for inclusion in their premiere annual list of America’s leading lawyers. Preti is recognized for excellence in the practice areas...

News

Greg Hansel Named Top 25 Attorney of the Northeast Region by Attorney Intel

Preti Flaherty attorney Greg Hansel has been named one of the Top 25 Attorneys of the Northeast Region for 2024 by Attorney Intel . This year’s class of attorneys has been recognized for excelling...

News

Preti’s Sig Schutz Recognized as Member of NHPR’s Pulitzer-Finalist Team

Preti First Amendment attorney Sig Schutz has been recognized as “a core member of the [NHPR] team” involved in a podcast honored as a Pulitzer Prize finalist in the audio journalism category.  The podcast...

Publication

Compliance for Two—What Employers Need to Know about the Newly Effective Final Regulation for the Pregnant Workers Fairness Act

On June 18, 2024 the final rule from the U.S. Equal Employment Opportunity Commission (EEOC) implementing the Pregnant Workers Fairness Act (PWFA) takes effect, clarifying employers' obligations under this landmark legislation. Effective since June 27...

News

Preti Flaherty Welcomes Trusts and Estates Attorney Dianne Ricardo to the Firm

Preti Flaherty is pleased to announce that Dianne Ricardo has joined the firm’s Trusts & Estates Practice Group. Based out of the firm’s Concord, New Hampshire office, Dianne focuses her practice on comprehensive estate...

Publication

Maine Becomes Seventh State to Enact Uniform Public Expression Protection Act (UPEPA)

Maine is now the latest state to enact the Uniform Public Expression Protection Act (UPEPA)—following New Jersey, Oregon (substantially similar), Utah, Hawaii, Kentucky, and Washington. UPEPA aims to provide a clear framework for the...

Publication

Massachusetts High Court Issues Important Ruling Impacting Prompt Pay Act

Earlier today, the Massachusetts Supreme Judicial Court issued an order in the matter of Business Interiors Floor Covering Business Trust v. Graycor Construction Co. Inc. This decision presents the high court’s first ruling clarifying...

Publication

Understanding the Impact of the FTC’s New Noncompete Ban on Your Construction Business

A few weeks ago, the Federal Trade Commission (“FTC”) attracted considerable media coverage when it issued its final rule banning noncompete agreements for workers in most circumstances and making existing noncompetes for the vast...