Sean T. Sullivan, Esq.

Contact Info

Sean T. Sullivan, Esq.

As a partner of Dillon & Sullivan Attorneys at Law, Sean manages the firm’s civil litigation, real estate litigation, and personal injury practice.

Sean represents individuals and businesses in complex civil litigation and real estate law matters. Sean is licensed in the Commonwealth of Massachusetts and in the United States District Court for the District of Massachusetts.

In civil matters, Sean’s practice areas include: real estate litigation, boundary line disputes, zoning & conservation appeals, adverse possession, easement disputes, trespass, docks and waterways and other property related matters.

He also focuses on civil matters related to business disputes, breach of contract, consumer protection law, and home improvement contractor disputes. Sean has extensive litigation experience as well as business law expertise.

In business & transactional matters, Sean provides the following services to clients: entity formation, contract drafting, lease drafting, partnership agreements & operating agreements, business purchase & sale agreements, website privacy policies, and terms & conditions.

Sean grew up on the South Shore and is a graduate of Suffolk University where he studied business. Following this, Sean attended Suffolk University Law School where received the “Honorable Mention Brief Award” in recognition of outstanding performance in legal writing.

Since forming Dillon & Sullivan Attorneys at Law, Sean has provided legal representation and legal assistance to members of the community and has helped clients in a wide range of legal matters. Sean actively mentors current law students and offers guidance and advice to help aspiring attorneys.

Practice Areas


  • Suffolk University – B.S.
  • Suffolk University Law School – J.D.


Bar Admissions

  • Commonwealth of Massachusetts
  • Federal District Court for the District of Massachusetts