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Practice areas


  1. Personal Injury: 20%
  2. Wrongful Death: 15%
  3. Medical Malpractice: 15%
  4. Car Accidents: 15%
  5. Other: 35%
  6. More 



Contingent (33-40%)

Attorney endorsements

1 total 

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  • Marsha Veron Kazarosian

    Walter Costello is a highly respected, recognized giant in the legal community, both in MA and nationally. Identified as one of the Best Lawyers in America since 1978, he is the epitome of the principled, gracious, yet zealous advocate that every lawyer should emulate. He is extremely knowledgeable in the law, and has been a mentor to many lawyers, including me. And I count myself very lucky for that privilege. His advice and counsel are constantly in demand and sought by seasoned attorneys, bar leadership, and jurists alike. He is honest and supremely ethical by nature, he is truly a lawyer's lawyer in the real sense of the term, and I cannot endorse him highly enough.


    Marsha Kazarosian Divorce & Separation Attorney
    Relationship: Fellow lawyer in community

Contact info

Kazarosian, Costello & O'Donnell, LLP

10 Federal Street.
Suite. 401
Salem, MA, 01970


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Centennial AwardMassachusetts Bar Association2011
AV Peer Review RatingMartindale-Hubbell2011
Work experience
TitleCompany nameDuration
PresidentWalter A costello,jr And Associstes1995 - Present
Association namePosition nameDuration
Massachusetts Bar AssociationExecutive Council2007 - Present
Association of Trial Lawyers of AmericaBoard of Governors1994 - 2002
Essex County Bar AssociationPast President1992 - 1994
Massachusetts Academy of Trial AttorneysPast President1990 - 1992
School nameMajorDegreeGraduated
Boston College Law SchoolLawJD - Juris Doctor1973
Boston UniversityEconomicsBA - Bachelor of Arts1969