John S. Harmon

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.

Mark T. Bettencourt is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Mergers and Acquisitions Law, Technology Law and Venture Capital Law. Mark T., who practices law in Boston, Massachusetts, has been recognized since 2009. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark T. is held by other top lawyers in the same geographic and legal practice area.

Ilan Barzilay is an intellectual property practitioner specializing in obtaining and enforcing patent rights. Ilan leads a team of attorneys that procures patents for clients ranging from technology startups and research institutions to established companies and multinational corporations. He is a trusted advisor to clients seeking meaningful patent protection crafted to align with important business goals. His practice also includes handling contentious matters in the federal courts and befo...

David G. Thomas is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. David G., 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 David G. is held by other top lawyers in the same geographic and legal practice area.

Mark C. Kalpin is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law, Energy Regulatory Law, Environmental Law, Natural Resources Law and Oil and Gas Law. 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.

Zachary counsels clients in pursuing commercially relevant intellectual property protection strategies. He has extensive experience securing patents in areas including life sciences, biotechnology, bioinformatics, pharmaceuticals, semiconductor devices, and optical systems. He assists clients in pursuing effective prosecution strategies. His experience includes drafting and filing patent applications, drafting claims, responding to Office Actions, prosecuting broadening reissue applications, ...

Elisa A. Filman is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Elisa A., who practices law in Needham, Massachusetts, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Elisa A. is held by other top lawyers in the same geographic and legal practice area.

Danilo Santucci is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Danilo, 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 Danilo is held by other top lawyers in the same geographic and legal practice area.

Mary B. Kuusisto is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Private Funds / Hedge Funds Law and Tax Law. Mary B., who practices law in Boston, Massachusetts, has been recognized since 2009. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary B. is held by other top lawyers in the same geographic and legal practice area.

Ameek is director of Sullivan's Tax Department and a former member of the firm's Management Committee. His practice includes domestic and international taxation, with an emphasis on mergers & acquisitions and REIT transactions. Ameek is nationally recognized for his work in REIT conversions and REIT cross-border matters. He has represented public and private REITs in an array of real property sectors, both domestically and abroad, including: business storage facilities; cold storage facil...