David M. Losier

David M. Losier

Sheehan Phinney • Boston, MA
Business LitigationGovernment Investigations and White-Collar Criminal Defense

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Contact

Email
ktrudel@sheehan.com
Phone
603-945-9922
Address
Boston, MA, 02109, US

Professional

Bar Admissions
Massachusetts1992U.S. District Court District of MassachusettsU.S. Court of Appeals 1st Circuit

About

David is a member of the firm’s Business Litigation Department where his diverse practice includes complex business litigation and felony criminal matters. He represents individuals and companies in state and federal matters often involving breaches of fiduciary duty, misrepresentation and fraud. Additionally, Dave coordinates and oversees internal corporate investigations. He has successfully represented secondary, college and graduate school students in disciplinary actions brought before school judiciary panels and successfully resolved related criminal cases in a way that facilitates the students’ continued enrollment in the school. Clients often rely on David for unexpected and emergent personal and business issues that require immediate advice. He recognizes the importance of being responsive, listening, assessing the problem and the client’s concern and assuring the client they are understood and they are not alone. David takes pride in taking on a client’s problem as if it were his own. His clients are often successful individuals at the helm of equally successful businesses. David takes an active and lead role in resolving the problem in a way that allows the client to remain focused on their business or personal endeavors. “I am a trusted confidant who will tell it to them straight and help clients make informed, albeit sometimes difficult, personal or business decisions. I try to make each client feel as if they are my only client and their case is the most important case I am handling.” David was a former Middlesex County assistant district attorney for nearly a decade before entering private practice. Prior to Sheehan Phinney, he was a partner at Burns & Levinson.

Credentials

Education
Suffolk University Law School, Boston, Massachusetts, 1992 | J.D. | Honors: cum laude | Honors: Suffolk University Law School, Alumni Mentor | Colby College, 1989 | B.S.

Recognition & Involvement

Awards
Massachusetts Super Lawyers “Rising Star” in 2006. | Rising Star by Massachusetts Super Lawyers®, Business Litigation & White Collar Crimes | Martindale-Hubbell, Preeminent Rating
Associations
Project Alliance (Board of directors)
Speaking
Criminal Issues in the District and Probate Courts: Where Criminal Law and Family Law Collide, October 10, 2006 - Present | Criminal Justice Program, December 14, 2009 - Present | The CSI Effect: Fact or Fiction?, Boston Bar Assocation - Criminal Law Section Event, April 27, 2011 - Present | Dental Seminar, Avoiding the Pitfalls of Dental Practice Transitions, March 18, 2011 - Present
Updated: Mar 15, 2026