Michael J. Duffy






Mike Duffy’s practice focuses on advising clients through complex disputes arising out of business relationships, commercial transactions, land use, real estate development, and construction projects.  He has represented clients in trials, appeals, mediations and arbitrations before state and federal courts, arbitrators and neutrals as well as state, regional and local regulatory bodies, commissions and boards.    


Mike’s land use litigation experience is extensive.  Mike is an adjunct faculty member at New England School of Law, where he has taught land use.  He is the Chair of the Salem Zoning Board of Appeals, and has represented landowners, developers and abutters in numerous planning, zoning and subdivision disputes.  Mike’s experience ranges from litigating first impression issues of constitutional and statutory authority, to zoning interpretation, open meeting and public records violations.  He has represented developers of large commercial projects and residential property owners.  Mike brings legal academic, local government, and a trial lawyer’s perspectives to resolving land use disputes.  His overall experience also includes having successfully handled numerous real estate and construction litigation cases involving a wide variety of issues from property line disputes and easement disputes to inverse condemnation cases.


Mike’s business and commercial litigation experience involves counseling business owners and operators through shareholder and derivative claims, corporate governance disputes, breach of fiduciary duty claims, employment matters, intellectual property, contract and business tort cases. In addition to helping clients resolve claims through direct negotiation, mediation and arbitration, Mike has represented dozens of clients through litigation, trial and appeal.  A trial lawyer at heart, Mike is equally comfortable advocating in the boardroom and the courtroom.  In addition to helping clients resolve legal disputes, Mike regularly acts as outside legal and compliance counsel for clients to help reduce risk and avoid problems before they become disruptive to business operations.


Prior to founding Tymann, Davis and Duffy with Ben and Ethan, Mike was a law clerk to the Honorable Roderick L Ireland of the Massachusetts Supreme Judicial Court, practiced at Choate, Hall & Stewart, LLP, one of Boston's most prominent law firms, and practiced at Ruberto, Israel & Weiner, P.C., New England’s preeminent restaurant and hospitality firm.


Education: J.D., summa cum laude, Suffolk University Law School, 2001 (Editor-in-Chief, Suffolk University Law Review);

B.A., University of New Hampshire, 1998


Admitted to Practice: Massachusetts; District of Columbia; U.S. District Court for the District of Massachusetts; U.S. Court of Appeals for the First Circuit; United States Court of Appeals for the District of Columbia Circuit.