Walter A. Costello's Profile Image

Walter A. Costello, Jr.

546 Main Street Haverhill, Massachusetts 01830
Firm: Kazarosian Costello LLP
 |  Website
Edit Your Profile
To edit your Lawyer Directory information, please login to your
Best Lawyers® Admin Account.
If you have any questions or need assistance, please contact us at or 803.648.0300.

Kazarosian Costello LLP

Years In Practice

Phone Number (978) 372-7758

Attorney Walter A. Costello, Jr., represents plaintiffs in cases involving serious and catastrophic personal injuries. Over his more than 40-year career, he has handled a wide array of matters leading to multi-million dollar results for his clients, including motor vehicle and trucking accidents, construction site injuries, products liability, premises liability, medical malpractice/nursing home liability, and aquatic injury claims.  

A past president of the Massachusetts Academy of Trial Attorneys, the American Association for Justice and Essex County Bar Association, Attorney Costello has also been appointed to several leadership roles within the Massachusetts Bar Association, including many years of service on the Executive Committee. 

He is recognized in Best Lawyers in America and has also been identified as a Super Lawyer by New England Super Lawyers Magazine every year since 2006, in recognition of his work representing plaintiffs in personal injury cases. He has also received multiple awards for excellence from the national plaintiffs’ attorneys group, the American Association for Justice, as well as serving on the organization’s Executive Committee. Costello has a 10.0 Superb rating from He has lectured frequently on practice and procedure, and co-founded the Essex County Superior Court’s Voluntary Mediation/Conciliation Program.  

Costello is a partner at Kazarosian Costello LLP, with offices in Haverhill and Salem, Mass. Read more about Kazarosian Costello LLP on the firm’s website:

What legal services does this lawyer offer?
  • Best Lawyers in America
  • Who's Who American Lawyer
  • Super Lawyers: Personal Injury-Plaintiff
  • Massachusetts Bar Association, Centennial Award, 2011
  • American Association for Justice, Wiedemann Wysocki Citation of Excellence, 1996
  • American Association for Justice, Wiedemann Wysocki Citation of Excellence, 1993