Jason D. Frank

Jeff Francis is an experienced trial lawyer who has successfully represented clients in complex commercial and intellectual property litigation matters throughout the U.S. His practice includes litigation involving patent, trademark, copyright, and trade secret disputes; technology development and/or licensing; large loss fire investigations, commercial property and business interruption insurance; and commercial disparagement, defamation and harassment. One focus of Jeff’s practice is ...

Damien M. DiGiovanni is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Damien M., 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 Damien M. is held by other top lawyers in the same geographic and legal practice area.

Lynne F. Riley is a top attorney recognized by Best Lawyers in the practice area(s) of Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law and Litigation - Bankruptcy. Lynne F., 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 Lynne F. is held by other top lawyers in the same geographic and legal practice area.

Patricia C. Lynch is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law. Patricia 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 Patricia C. is held by other top lawyers in the same geographic and legal practice area.

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

James T. Mattus is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. James T., 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 James T. is held by other top lawyers in the same geographic and legal practice area.

Thomas has over 20 years of experience representing industry leaders in life sciences. He is internationally recognized for his experience in creating, implementing and monetizing effective patent strategies. He represents public and private companies, investors and academic institutions in the life sciences arena. His portfolio of life sciences companies spans diagnostics, medical devices, life science tools and technology platforms, genomics and therapeutics. Before joining Sullivan, Tom wa...

With over three decades of litigation and transactional experience, Jeff is widely recognized as one of the top environmental lawyers in the country. Clients seek him out to solve complex environmental law challenges. Some of the largest global companies rely on Jeff’s insights and strategic guidance. Clients praise him as “the top environmental attorney you will find in Boston” and say his “judgment on sensitive political issues is invaluable.” Jeff is ranked Ba...

Stephen Riden is a commercial litigator who represents corporate and individual clients in a wide array of disputes across the country. Stephen has extensive experience litigating business disputes involving breach of contract, fraud, unfair competition, trade secrets, and noncompete agreements. He has represented companies in a variety of governmental investigations. Stephen also has substantial experience representing owners involved in intra-corporate disputes, including shareholder litiga...

Gordon P. Katz is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Gordon P., who practices law in Boston, Massachusetts, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gordon P. is held by other top lawyers in the same geographic and legal practice area.