H. Andrew "Drew" Matzkin

David serves as Managing Partner and is a Tax Partner in Sullivan’s Boston office, bringing over 25 years of experience to his dual roles. Leadership Role As Managing Partner, David collaborates closely with the firm’s Management Committee, partners, and business professionals to advance Sullivan’s vision of becoming a leading global, commercially focused mid-size law firm. He is dedicated to: Cultivating a culture of deep loyalty and high performance Implementing innovative...

Brian Mukherjee is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Brian, 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 Brian is held by other top lawyers in the same geographic and legal practice area.

Ronald Cahill is well-respected for his work with clients of virtually all sizes to solve their most challenging intellectual property problems. His advice ranges from designing protection that maximizes the value of the client’s investment in research and development to applying that IP in court and in the marketplace, which allows clients to realize that value. With decades of courtroom experience, Ron has led trial teams in patent infringement cases around the country. He also conduc...

Ronaldo Rauseo-Ricupero is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Ronaldo, 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 Ronaldo is held by other top lawyers in the same geographic and legal practice area.

Joseph P. McConnell is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management. Joseph P., who practices law in Boston, Massachusetts, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joseph P. is held by other top lawyers in the same geographic and legal practice area.

Colleen M. Hennessey is a top attorney recognized by Best Lawyers in the practice area(s) of Product Liability Litigation - Defendants. Colleen M., 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 Colleen M. is held by other top lawyers in the same geographic and legal practice area.

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...

Richard Zielinski, who practices in Boston and New York, is a nationally known ‘bet the company’ trial lawyer who handles a wide range of complex, high-stakes commercial litigation. He is also known for his specific expertise in legal malpractice defense. According to Chambers USA, Richard is ‘very smart, thorough and knowledgeable. ’ Clients say he is ‘fantastic on his feet’ and ‘thinks seven steps ahead of everyone else.’ He has extensive tria...

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Alden J. Bianchi is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Alden J., who practices law in Boston, Massachusetts, has been recognized since 1995. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alden J. is held by other top lawyers in the same geographic and legal practice area.