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About me

William F. Sullivan is considered to be one of the top criminal defense lawyers in Massachusetts. He has successfully represented clients throughout the country and obtained acquittals on charges ranging from First Degree Murder, Rape, Drug Trafficking, Child Sexual Abuse, Motor Vehicle Homicide and Drunk Driving.

In addition to his extensive criminal law experience, Mr. Sullivan has successfully tried numerous civil trials and arbitrations on plaintiffs' personal injury cases.

Mr. Sullivan is a past president of the Norfolk County and Quincy Bar Associations and remains a member of the Associations’ Board of Directors. He is a Lifetime Fellow of the Massachusetts Bar Foundation. In 2005, he was named the Norfolk Bar Association’s Man of the Year. In 2007 he was also named the Quincy Bar Association’s Man of the Year. He is a past member of the Massachusetts Bar Association’s Access to Justice Committee and the Committee for Judicial Independence. He was named by the Governor as a Commissioner on the State Judicial Nominating Commission and served from 2003 to 2007.

Atty. Sullivan often lectures on criminal defense and trial practice throughout Massachusetts and is a contributing author on a number of books relating to criminal law.

Mr. Sullivan was born and raised in the Boston area, graduated from the University of Notre Dame and Boston College Law School. Mr. Sullivan is married with 3 sons and is a coach for youth soccer and baseball as well as active in various civic organizations such as the St. Vincent DePaul Society and Catholic Charities.


Photos and videos

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Practice areas


  1. Criminal Defense: 90%
  2. Personal Injury: 10%



Hourly ($250-400/hour), Fixed (sometimes), Retainer (sometimes), Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

4 total 

Are you an attorney? Endorse this lawyer

  • Morgan J Gray

    I endorse this lawyer.


    Morgan Gray Workers Compensation Attorney
    Relationship: Fellow lawyer in community

  • Nicolas A. Gordon

    Watched him conduct a criminal trial in a very serious, complex and difficult case. His client was found not guilty and I was extremely impressed with his obvious skill, knowledge and passion. Fantastic attorney!


    Nicolas Gordon Criminal Defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Sullivan and Sweeney, LLP

277 Newport Ave.
Quincy, MA, 02170-1736

William F. Sullivan

Washington St.
Canton, MA, 02021



We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Man of the YearQuincy Bar Association2007
Man of the YearNorfolk Bar Association2005
Work experience
TitleCompany nameDuration
Special Assistant City SolicitorCity of Quincy2006 - 2008
Assistant District AttorneyNorfolk District Attorney1982 - 1985
Association namePosition nameDuration
Bar Association of Norfolk CountyBoard of Directors2001 - Present
Norfolk Bar AssociationPast President2000 - Present
Massachusetts Bar FoundationFellow2000 - Present
Quincy Bar AssociationPast President1985 - Present
Legal cases
Case nameOutcome
Commonwealth v McCarthyDrug Case dismissal of case
Commonwealth v LeClairNot Guilty First Degree Murder
Commonwealth v AverettMurder Not Guilty
See all legal cases 
Publication nameTitleDate
Crime and ConsequencesRule 30 Motions for New TrialN/A
Prosecuting and Defending Sex CrimesCross Examination of Child WitnessesN/A
School nameMajorDegreeGraduated
University of Notre DameN/AN/AN/A
Boston College Law SchoolLawJD - Juris DoctorN/A
Speaking engagements
Conference nameTitleDate
Experts on ExpertsCross Examining Experts Criminal Cases2013
Superior CourtCutting Edge Evidentiary Issues2010
MBA 200th AnniversaySacco and Vanzetti Trial Recreation2010
Digital ForensicsMotor Vehicle Homicides and Evidence2008
Criminal EvidenceTrial Evidence2007
Effects of Comm. v DiGiambattistaCriminal Evidence2005
OUI TrialsCross Examination2000