About
Thomas O. Mason is the founder of the Mason Law Firm, based in Lynn, Massachusetts, where he provides legal counsel in estate planning, personal injury, and general litigation matters. Since establishing the firm, he has focused on delivering practical, client-centered legal solutions designed to protect individual rights and long-term interests.
Thomas earned his Juris Doctor from New England Law in Boston in 1991, graduating cum laude in the top ten percent of his class. His strong academic performance laid the foundation for a legal career rooted in careful analysis, sound judgment, and effective advocacy for his clients.
Following law school, Thomas began his legal career at the Law Offices of Robert A. Constantino, Esq., where he worked on matters involving family law, personal injury, and real estate. This early experience provided broad exposure to litigation and client representation during emotionally and financially complex situations.
After launching Mason Law Firm several years later, Thomas expanded his practice into general litigation while maintaining a strong focus on estate planning and personal injury law. His approach emphasizes clear communication, straightforward legal advice, and guiding clients through challenging circumstances with professionalism and care.
In addition to his legal practice, Thomas is licensed in Massachusetts as a real estate broker and as a life, health, and accident insurance provider. This combination of professional credentials allows him to offer clients well-rounded guidance on legal, property, and planning-related matters.
Thomas O. Mason remains committed to providing dependable legal representation to individuals and families throughout Lynn and the surrounding communities. Through Mason Law Firm, he strives to deliver personalized service, diligent advocacy, and reliable counsel to clients navigating important legal decisions.
Law Office Affiliations
- Owner, Mason Law Firm
- Member, Massachusetts Bar Association
Licensed State
- Massachusetts
Education
- New England Law
Juris Doctor (JD)
Awards & Badges

- Business Litigation
- Mergers And Acquisitions
- Trusts
- Wills And Living Wills
- Animal and Dog Bites
- Brain Injury
- Car Accidents
- Construction Accidents
- Motorcycle Accidents
- Slip & Fall Accidents
- Trucking Accidents
- Wrongful Death
- Commercial Real Estate
- Land Use And Zoning
- Residential Real Estate
- Guardianship




