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

Publication

131st Maine Legislature End of Session Update

The First Regular Session of the 131st Legislature was expected to end on June 15th or soon after. Instead, the First Regular Session ended on March 30th, and the Governor signed the “continuing services&rdquo...

News

Preti Flaherty Litigation Practice Group Adds Four New Attorneys

Preti Flaherty is pleased to announce the addition of four experienced Associates to the firm’s Litigation Practice Group: Stephen Garvey, Michael Hanify, Hanna May, and Tiffany Ottenga. Stephen Garvey is a graduate of Boston...

News

Jeffrey Talbert Named to American College of Environmental Lawyers

Jeffrey Talbert, Chair of Preti Flaherty’s Environmental Law Group, has been invited to become a Fellow in the distinguished American College of Environmental Lawyers (ACOEL). Membership in the premiere association of environmental lawyers is by...

Publication

How to navigate the legal side of nondisclosure agreements

Preti Flaherty attorney Kristy Abraham has authored an article for  MaineBiz  on navigating the legal side of nondisclosure agreements (NDAs), outlining six questions for organizations to review before entering into a NDA.

Press Coverage

Maine Media Organizations Oppose Foreign Electioneering Ban

Question 2 on Maine’s November ballot asserts that corporations owned or controlled by foreign governments do not have the same rights to political speech as companies here in the U.S. and that foreign governments should be prohibited...

Publication

Schutz and Harriman Author Article for MLRC on Mill's Veto of Constitutionally Fraught Legislation

In an article for the Media Law Resource Center's July 2023 Media Law Letter,  Preti Flaherty attorneys Sig Schutz and Alex Harriman explore Gov. Janet Mills' recent veto of L.D. 1610, “An Act to Prohibit Campaign Spending...

Press Coverage

Maine Center for Public Interest Reporting Wins Public Records Dispute with York County Jail

Event

2023 Maine Employment Law Summit

For nearly 30 years, Preti Flaherty's Employment Law team has provided Maine employers with practical guidance and best practices at our annual Employment Law Summit. Join us  Thursday, October 5  for the 2023 Employment...

News

Matt Warner Named to Cannabis Law Journal Global Top 200 Cannabis Lawyers 2023

Preti Flaherty attorney and Cannabis Business Group member Matt Warner has been named to the list of Global Top 200 Cannabis Lawyers for 2023-2024. A joint publication of  Cannabis Law Report and  Cannabis Law...

Publication

Municipal Update: Maine Legislature Acts to Clarify Sales of Tax-Acquired Properties

Early this week, in response to the  United States Supreme Court’s recent decision in  Tyler v. Hennepin County, Minnesota  (598 U.S. (2023)) , the Maine Legislature passed emergency legislation establishing a new process for...