Christopher R. O'Hara

Michael S. Hines is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Michael S., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael S. is held by other top lawyers in the same geographic and legal practice area.

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Dan practiced at the firm between 1987 and 2005, before leaving to become General Counsel at GSI Group, a NASDAQ traded company with a highly diversified portfolio of laser, precision positioning, specialty optics and laser-based system products. He rejoined the firm in 2011 and manages the Litigation Practice. During his career, Dan has tried numerous cases throughout the country in both state and federal courts. His practice includes commercial business disputes involving mergers and acquis...

Joe Ambash is the managing partner of the Boston office. His practice includes all aspects of employment law, including labor-management relations, employment discrimination and wrongful discharge litigation, and preventive labor relations. He also has an extensive practice training managers in all areas of employment law compliance. Joe represents management in a broad range of industries, including health care, higher education, financial services, retail, media, sports and state and local ...

Sean M. O'Brien is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Sean M., who practices law in Boston, Massachusetts, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sean M. is held by other top lawyers in the same geographic and legal practice area.

Katie D. Cintolo is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Katie D., who practices law in Lexington, Massachusetts, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katie D. is held by other top lawyers in the same geographic and legal practice area.

A trial lawyer, David A. Vicinanzo serves a broad array of clients—from Fortune 100 to pro bono —in New England, New York, the Washington, DC, area, and elsewhere. He practices primarily in the area of government investigations and the representation of organizations and individuals in complex civil and criminal matters. What do you focus on? Before joining the firm, I was a federal prosecutor in Washington, DC, and New England for thirteen years. I served in Washington, DC, as an...

Mark C. Michalowski is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Mark C., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark C. is held by other top lawyers in the same geographic and legal practice area.

Dan Rabinovitz co-manages the firm’s Litigation Department. He is a trial lawyer with 30 years of experience and began his career prosecuting violent crime with the Cook County State’s Attorney’s Office in Chicago, Illinois. He has handled a wide variety of civil and criminal matters, representing corporations and individuals and he has tried hundreds of cases, including numerous civil and criminal jury trials in state and federal courts. Currently, his practice focuses on w...

Rob is a regulatory and business lawyer with extensive experience dealing with legal issues faced by clients in highly regulated industries. He represents competitive energy and communications companies nationally and routinely represents clients in a wide range of regulatory issues. Rob has covered every aspect of New England regulations for electricity, communications, natural gas and water clients, from obtaining utility commission and local licenses to ensuring ongoing compliance with sta...