Daniel Rosenthal

Daniel L. Rosenthal

Dan is a litigator with extensive experience in a diverse range of complex civil matters.  Dan’s clients range from Fortune 500 companies to small businesses and individuals, and he has advocated for those clients in federal and state trial and appellate courts, as well as in administrative tribunals, arbitration and mediation.  Dan’s cases have involved a broad array of areas including franchise, shareholder-rights, fiduciary-duty, commercial, railroad, product liability, insurance and constitutional issues.

A significant element of Dan’s practice is representation of automobile manufacturers in recurring franchise litigation with dealers.  Dan has also handled franchise and dealership issues in a number of other industries.  Dan is a member of the American Bar Association’s Forum on Franchising, as well as the Maine State Bar Association.

Before joining Marcus Clegg in 2010, Dan was a partner in a large Portland law firm, where he had practiced since 1998 and served as Chair and Vice Chair of the firm’s Trial Department.  From 1997 to 1998, Dan served as a law clerk to then-Chief Judge Ronald R. Lagueux of the United States District Court for the District of Rhode Island.

Dan is the author of a chapter on discovery depositions in the volume, “A Practical Guide to Discovery and Depositions in Maine” (MCLE 2014), and he has served as a continuing legal education presenter on trial evidence and objections.  He is rated “AV Preeminent” by Martindale-Hubbell and has been selected repeatedly for inclusion in the Benchmark Litigation guide, which is based on interviews with attorneys and clients.


J.D., summa cum laude, Boston College Law School, 1997

A.B., cum laude, Bowdoin College, 1992

Admitted to Practice

  • Maine
  • Massachusetts
  • United States District Court for the District of Maine
  • United States District Court for the District of Massachusetts
  • United States Court of Appeals for the First Circuit