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Justin P O'Brien


Boston College Law School, Newton, MA, J.D., magna cum laude, 2003

Harvard University, Cambridge, MA, B.A. History, cum laude, 1994


Admissions to Practice

Commonwealth of Massachusetts

United States Court of Appeals for the First Circuit

United States District Court, District of Massachusetts


Professional Affiliations

Vice Chair, Life Sciences Interest Group, ABA Health Law Section

Former Co-Chair, ABA Regional White Collar Crime Young Lawyers Subcommittee

American Bar Association

Boston Bar Association

Federal Bar Association


Awards and Recognitions

Massachusetts Super Lawyer, General Litigation (2014)

Rising Star, General Litigation, New England Super Lawyers (2012-2013)

Rising Star, Criminal Defense, White Collar, New England Super Lawyers (2009-2011)

Privitera Family Commencement Award for Outstanding Scholarship and Exceptional Contribution to Boston College Law School (2003)

Order of the Coif, Boston College Law School (2003)


Continuing Education and Commitment to Excellence

Panelist, "1L Bootcamp: Networking with Practitioners", Boston College Law School (2015)

Moderator, "What To Do When Problems Arise," American Bar Association and Medical Device Conference (2014)

Panelist, "Discovery Disputes: Best Practices and Strategies for Getting What you Want," Boston Bar Association (2014)

Faculty, "Civil Motions Practice Workshop," Massachusetts Continuing Legal Education (2013)

Panelist, "What Every Federal Practitioner Needs to Know About Federal Government Litigation," Boston Bar Association (2011)

Participant, American Bar Association Annual National Institute on White Collar Crime Conference

Participant, National Institute for Trial Advocacy


Publications and Press

Collora Shareholder, Justin O’Brien, Named Vice Chair of the Life Sciences Group for the American Bar Association's Health Law Section

Author, "Potential Changes Ahead for Payments in Federal Fraud Cases," ABA Health Law Section, April 2014

Co-Author, "Evidentiary Issues in the Superior Court," Massachusetts Superior Court Criminal Practice Manual (MCLE 2014) (forthcoming)

Collora LLP Wins Supreme Judicial Court Decision on Enforcement of Arbitration Agreements

Collora LLP Names Three to Partnership

Author, "Images of Icons of Justice," Massachusetts Lawyers Weekly, May 28, 2012

Dwyer & Collora Attorneys Win First Circuit Case That Limits Who May Bring Claims Against Federal Contractors Under the Federal False Claims Act

White Collar/Government Enforcement Blog


Pro Bono / Community Service

Supporter and former Board of Directors member, Families for Depression Awareness

Member and volunteer, Boston College Law School Alumni Association     

Volunteer attorney, Framingham Project for Incarcerated Women

Justin P. O'Brien

617 371 1035



Clients and Industries

Justin has advised and represented public and private companies, professional service firms, executives, managers, and licensed professionals in a variety of fields, including financial services, securities trading, health care, medical devices, manufacturing, pharmaceuticals, engineering, construction, insurance, real estate, telecommunications, software, retail, and government. 

Practice Areas and Experience

Justin has appeared in state and federal courts, at both the trial and appellate levels, and before various government agencies, representing clients in civil litigation and in defense of government enforcement actions.

In civil matters, he has litigated, negotiated, and resolved commercial disputes involving many different claims, including actions for fraud and misrepresentation, breach of contract, professional malpractice, and unfair and deceptive business practices.

In government investigations and criminal defense matters, he has represented clients in cases involving federal prosecutors, the state Attorney General, and various state and federal agencies. 

Professional Experience Outside of Collora LLP

Justin served as a law clerk to the Honorable Patti B. Saris on the United States District Court and as an attorney at Foley Hoag LLP before joining Collora LLP in 2005. He also previously worked as a public affairs consultant and as a political campaign organizer for candidates including U.S. Senators Edward Kennedy and John Kerry.

Sample of Results in Practice *

  • Won jury trial for plaintiff in state Superior Court regarding multiple fraudulent transfers of financial assets worth over $2 million.
  • Won decision in Massachusetts Supreme Judicial Court that established the enforceability of arbitration agreements for unfair and deceptive trade practices claims that involve interstate commerce.
  • Won dismissal of federal civil False Claims Act case against a city and its mayor in case involving alleged housing fraud, and succeeded in having dismissal affirmed by the U.S. Court of Appeals for the 1st Circuit based in part on issues of first impression.
  • Won a multi-million dollar federal court verdict for a domestic subsidiary of a multi-billion dollar international company involved in a complex commercial agreement dispute. Our client won despite a previous conviction of the client’s local manager in connection with the contract. Case involved issues of first impression under the Uniform Procurement Act in Massachusetts.
  • Successfully settled civil lawsuit involving dispute over rights to certain engineering intellectual property, attaining the goals set by the client.
  • Won reversal on appeal of a trial court’s damages award against our client regarding real estate finance transactions.
  • Defended public contractor in federal and state investigations and in civil litigation stemming from Central Artery Project (the "Big Dig") with successful pretrial resolutions of all matters.

* This sampling of cases represents a selected, small portion of this lawyer’s total experience, and past performance is not intended to be a representation of likely future results, which must be assessed on a case-by-case basis.

About Justin

Justin grew up in Brookline, Massachusetts, the youngest of six children. A student of history and politics, he has worked in all three branches of the federal government, committed the names of every U.S. president in order to memory, and is an avid reader of historic markers and plaques. Justin also enjoys hiking and considers The Godfather the best movie ever made.