John L. Sullivan

Peter L. Welsh is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Litigation - Securities. Peter L., who practices law in Boston, Massachusetts, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter L. is held by other top lawyers in the same geographic and legal practice area.

Eric W. Macaux is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Eric W., who practices law in Boston, Massachusetts, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Eric W. is held by other top lawyers in the same geographic and legal practice area.

James O. Fleckner is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law and Litigation - ERISA. James O., who practices law in Boston, Massachusetts, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which James O. is held by other top lawyers in the same geographic and legal practice area.

Joan E. Kolligian is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law and Family Law Mediation. Joan E., who practices law in Boston, Massachusetts, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joan E. is held by other top lawyers in the same geographic and legal practice area.

Graham Robinson focuses his practice on mergers, acquisitions and other transactions in the pharmaceutical, medical device and technology industries in the U.S. and internationally. He also regularly represents both private equity funds and hedge funds on a wide range of matters. Mr. Robinson’s health care clients have included, among others, Alnara Pharmaceuticals, Alpharma Pharmaceuticals, Bayer, Dendreon Corporation, PerkinElmer Inc., Prism Pharmaceuticals, Savient Pharmaceuticals, T...

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...

Catherine A. Bednar is a top attorney recognized by Best Lawyers in the practice area(s) of Product Liability Litigation - Defendants. Catherine A., who practices law in Boston, Massachusetts, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Catherine A. is held by other top lawyers in the same geographic and legal practice area.

Amy Hackett is a Partner in Peckar & Abramson PC’s Boston, Massachusetts office, where she focuses her practice on Litigation – Construction . She represents general contractors, public and private owners, developers, and financial institutions in complex construction, real estate, and commercial disputes throughout New England and in other jurisdictions. Amy counsels and advocates for clients in matters involving construction contract claims, design and construction defect di...

Malcolm B. Nicholls III is a partner in the Corporate Department. He has over fifteen years of experience in the private equity field, with a focus on national and international private equity transactions. Malcolm advises private equity fund managers, institutional investors and investment advisors on a broad range of issues, including fund formations, secondary transactions, portfolio investments, internal governance and divestments and distributions. A significant portion of Malcolm’...

J. Gregory Milmoe brings to his practice wide-ranging corporate experience including in-court and out-of-court restructurings, hostile and negotiated mergers and acquisitions, leveraged buyouts and corporate financings including initial public offerings and transactions involving REITs. He draws on this experience to help fashion pragmatic, sometimes novel, solutions to complex problems that frequently blend and adapt techniques from various legal disciplines. Well known for his role in the L...