William L. Walsh


Dedicated to effective advocacy and meaningful case resolution.

31 St. James Ave.
10th Floor
Boston, MA 02116


Since 2018, William L. Walsh (Liam) has litigated cases in all areas of the firm’s personal injury practice, focusing on premises liability, medical malpractice, defective product claims and construction site cases. Liam brings a fresh approach to each case, working closely with all of his clients to achieve results on their terms. Before joining as an associate, Liam worked for the firm full time for several years, including while he attended law school. His years of experience have helped to cultivate a deep understanding of meticulous case management and the litigation process.

Liam is an active member of the member of the bar and is engaged with a number of civic and legal organizations. In 2023, he was appointed for a second term on the Massachusetts Bar Association Young Lawyers Division Board of Directors and is currently a member of the Emerging Leaders Board at the Boston Health Care for the Homeless Program.

Before joining SUGARMAN, Liam gained valuable advocacy experience working in constituent services in a district office of the U.S. House of Representatives. He graduated from Suffolk University Law School in 2018 after earning his Bachelor of Arts in Economics from the University of Massachusetts Amherst in 2015. Having worked and studied internationally, Liam, who speaks French, has a unique perspective from which to approach client issues. He is also an avid runner and has completed several marathons, including the Boston and Dublin Marathons.

Significant Cases

Union ironworker requires back surgery after elevator mechanic suddenly stops elevator

Pre-trial settlement for union ironworker foreman who suffered debilitating back injuries when the construction elevator he was riding in came to a slamming stop when an elevator mechanic attempted to override the elevator’s electronic safety system without realizing that the elevator was in operation. The foreman was working at the Lowell Justice Center construction project at the time and was rendered totally disabled as a result of his injuries.

Aorta pierced during routine surgery

Just prior to scheduled trial, SUGARMAN's personal injury attorneys were able to obtain a substantial settlement for a patient who suffered catastrophic blood loss when the defendant surgeon pierced the patient's aorta with a surgical instrument during a surgery to treat diverticulitis. The surgery occurred at a hospital near Worcester, Massachusetts. The patient's blood loss led to the development of severe neurological injuries and personality changes that ended his work career and had a devastating effect on his marriage and family life.

construction Traumatic brain injury and eventual death following excavator accident

Settlement for the daughter of a construction worker who was struck by an excavator's boom on a large development project in Everett. The excavator operator knew that the worker was in the area, but failed to look and make sure that the worker was a safe distance away before the operator moved the boom and violently struck him. The worker suffered catastrophic injuries that eventually caused his death 3 months later. In addition to a host of safety violations and unsafe practices, SUGARMAN attorneys were able to establish that the excavator operator had been previously fired for unsafe operation by the same company that later hired him to work on the development project. The case resolved shortly before trial.

premises liability Nursing home guest slips on ice leaving facility

Settlement for a middle-aged woman who slipped and fell on an ice patch at the entrance to the defendant’s nursing home resulting in a rotator cuff tear requiring surgical repair, and back injuries. The client had been visiting her elderly father at the nursing home.

construction Wrongful death following crush injuries to forklift operator

Pre-trial settlement on behalf of children of a middle-aged temporary worker who was crushed to death between the forklift he was operating and a metal shelving unit in a South Shore warehouse where he had been assigned to work by his staffing agency.

medical malpractice Patient suffers debilitating stroke after not receiving medication

Pre-suit settlement of medical malpractice case for 61-year-old man who suffered major stroke after his doctors and nurses failed to administer a critical medication for two days while the man was a hospital inpatient following cardiac surgery.


  • J.D., Suffolk University Law School, 2018
  • B.A., University of Massachusetts Amherst, 2015

Bar Admission

  • Massachusetts, 2018
  • United States District Court, District of Massachusetts, 2019


  • Massachusetts Academy of Trial Attorneys
  • Massachusetts Bar Association
  • Boston Bar Association
  • American Association for Justice
  • “Massachusetts Super Lawyers, Rising Stars”, Law and Politics, 2020-23
  • Panelist: “Beyond Big Law”, Boston University School of Law/Massachusetts Bar Association Young Lawyers Division, March 21, 2023
  • Rated by Super Lawyers 2023
  • Rising Star Super Lawyers

How SUGARMAN Can Help You.

  • 1

    We will listen carefully to you.

  • 2

    We will advise you regarding your potential case and the relevant law.

  • 3

    We will investigate for you and bring legal proceedings if appropriate.

SUGARMAN lawyers know that the damage done to lives by injury can be profound, yet often difficult to quantify or describe. And those effects last a lifetime. Our personal injury lawyers have the experience and resources to make a powerful case by developing the evidence and using expert consultation and testimony in order to prove your claim at trial. Just as important, we represent the injured and their families with special regard for the social, mental and emotional issues they face.