justin duffy
Justin Duffy, Esq.
Associate Attorney
Law Offices of Anthony G. Puopolo
With distinction, Suffolk University Law School. Business Law & Financial Services concentration. A background in intellectual property, fraud litigation, and criminal prosecution that brings an unusually broad legal foundation to this firm.
Justin Duffy joined the Law Offices of Anthony G. Puopolo as an associate attorney bringing nearly a decade of legal and professional experience across intellectual property, fraud litigation, criminal prosecution, and civil practice. Before earning his law degree, Justin spent more than seven years at one of Boston's premier intellectual property firms and a major religious institution's general counsel office — developing a command of legal process, document strategy, and client management that most new attorneys spend years trying to build after the bar.
That breadth is not incidental. It is the reason Justin approaches each case the way he does — methodically, with a clear understanding of how legal systems actually work at the procedural level, and with the communication skills that come from years of translating complex legal matters for clients and practitioners alike.
Education and Credentials
Justin earned his Juris Doctor with distinction from Suffolk University Law School in Boston in May 2025, graduating with a Business Law and Financial Services concentration and a concentration GPA of 3.81. He was a Trustee Academic Scholarship recipient, earned Dean's List recognition for the 2023–2024 academic year, and received an Honorable Mention for both the Oral Advocate Award and the Brief Award in Legal Practice Skills. He also competed as a member of both the Securities Moot Court Team and the Foreign Direct Investment Moot Court Team.
Before law school, Justin graduated with honors from Principia College in Elsah, Illinois with a Bachelor of Arts in Political Science. He founded and captained the Principia College Mediation Team and earned top mediator and advocate honors in INADR tournament competition — a skill set that translates directly into the negotiation and advocacy work of civil and criminal practice.
He is admitted to practice in:
- Massachusetts state courts (BBO# 717411, admitted 2025)
- United States District Court, District of Massachusetts (admitted 2026)
A Foundation Built Across Multiple Legal Disciplines
Justin's path to this firm ran through some of the most technically demanding corners of the legal profession. At Wolf, Greenfield & Sacks — one of the country's leading intellectual property boutiques — he spent more than seven years preparing and filing formal documents with the United States Patent and Trademark Office, advising practitioners on client procedures, and managing the administrative infrastructure of a high-volume IP practice. At the First Church of Christ, Scientist's Office of the General Counsel, he drafted trademark licenses, cease-and-desist letters, and copyright filings, and assisted with immigration documentation and visa applications.
Those years gave Justin something courtroom training alone cannot replicate: a deep familiarity with how legal institutions process documents, manage deadlines, and respond to well-prepared submissions. That institutional fluency shows in how he prepares a motion, structures a discovery request, and anticipates procedural obstacles before they become problems.
Criminal Prosecution Experience: Suffolk County District Attorney's Office
During law school, Justin interned at the Suffolk County District Attorney's Office at Boston Municipal Court in West Roxbury, where he was certified under Massachusetts Supreme Judicial Court Rule 3:03 and appeared in criminal proceedings including arraignments, pretrial hearings, motions, disposition hearings, and a bench trial. He drafted discovery requests, reviewed discovery materials, formulated trial strategies, and conducted legal research for motions to suppress evidence, identification, and in limine.
That experience from the prosecution side is a meaningful asset in criminal defense. Understanding how a prosecutor builds a case — what they prioritize, where they look for weaknesses, and how they approach suppression hearings — directly informs how Justin prepares a defense.
Civil Litigation and Fraud Defense
Immediately following his bar admission, Justin joined Eugenie Reich Law in Boston as an associate attorney, representing individuals in connection with complex fraud actions. He conducted legal research, reviewed documents, drafted memoranda, disclosures, and complaints, and engaged in client interviewing. That experience in civil fraud litigation adds a dimension to the firm's civil litigation practice that complements the criminal defense and family law work at the core of the practice.
Serving Clients Across Essex and Middlesex County
Justin represents clients from the firm's offices in Lowell and North Andover, appearing in courts throughout Essex and Middlesex County including Lowell District Court, Middlesex Probate and Family Court in Woburn, and Essex County Probate and Family Court in Salem and Lawrence.
Frequently Asked Questions About Attorney Justin Duffy
Where did Justin Duffy go to law school?
Justin graduated with distinction from Suffolk University Law School in Boston in May 2025, finishing with a 3.53 GPA overall and a 3.81 GPA in his Business Law and Financial Services concentration. He was a Trustee Academic Scholarship recipient and earned Dean's List recognition during the 2023–2024 academic year.
What did Justin Duffy do before becoming an attorney?
Justin spent more than seven years at Wolf, Greenfield & Sacks, one of Boston's leading intellectual property firms, preparing and filing documents with the USPTO and advising practitioners on client procedures. He also worked in the general counsel office of the First Church of Christ, Scientist, where he handled trademark, copyright, and immigration matters. Prior to that, he competed as a top mediator and advocate in national INADR tournaments as captain of his college mediation team.
Does Justin Duffy have criminal court experience?
Yes. Justin interned at the Suffolk County District Attorney's Office at Boston Municipal Court, where he was certified under SJC Rule 3:03 and appeared in arraignments, pretrial hearings, motions, disposition hearings, and a bench trial. He also drafted discovery requests and conducted legal research for suppression motions — experience that directly informs how he approaches criminal defense at this firm.
What types of cases does Justin Duffy handle?
Justin's practice at the firm covers criminal defense and civil litigation, with a background that also includes intellectual property, fraud actions, and complex document-intensive matters. He brings courtroom experience from both the prosecution and defense sides of criminal practice.
Where are Justin Duffy's offices located?
Justin works from the firm's two office locations — 9 Middlesex Street in Lowell and 401 Andover Street in North Andover. He appears in courts throughout Essex and Middlesex County.
How do I schedule a consultation with Justin Duffy?
You can call the firm at 978-403-0006 or reach out through the contact form on our website. A member of our team will follow up to schedule your consultation.
Ready When You Are
Ready to Talk Through Your Case?
If you are facing a criminal charge or a civil dispute in Essex or Middlesex County, Justin is available for consultations at either office location or by phone. The earlier you reach out, the more options you have.