David D. Gammell

Jennifer concentrates her real estate development practice on complex, large-scale developments in and around the Greater Boston Area, with focus areas in life sciences development, renewable energy and ClimaTech real estate assets, and multi-family housing. Jenn represents traditional real estate developers as well as family offices, real estate investment trusts, REIMs, universities/colleges, hospitals, hotel owners and managers, and land-centric nonprofits. My focus Real Estate Development...

Daniel V. McCaughey is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Litigation - Regulatory Enforcement (SEC, Telecom, Energy). Daniel V., 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 Daniel V. is held by other top lawyers in the same geographic and legal practice area.

Eric Gold is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. Eric, 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 Eric is held by other top lawyers in the same geographic and legal practice area.

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

Theresa C. Kavanaugh is a top attorney recognized by Best Lawyers in the practice area(s) of Biotechnology and Life Sciences Practice and Patent Law. Theresa C., who practices law in Boston, Massachusetts, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Theresa C. is held by other top lawyers in the same geographic and legal practice area.

Sarah is a member of Sullivan’s REITs Practice Group. She advises public and private REITs, both domestic and foreign, in various industries, including: data centers, office buildings, commercial retail space, distributed antenna systems, timberlands and agricultural properties. She focuses on structuring and compliance work, including cross-border transactions. Sarah also has experience involving federal and state tax litigation and transactional planning involving corporate, franchise...

Kathleen M. Guilfoyle is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Defendants and Product Liability Litigation - Defendants. Kathleen 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 Kathleen M. is held by other top lawyers in the same geographic and legal practice area.

Lou, Co-Chair of the firm's Lateral Partner Hiring Committee and former member of Sullivan's Management Committee, represents clients, both public and private, in commercial acquisitions, dispositions and financings across various real estate asset classes, including office, retail, senior living, hospitality and marinas, many of which are multi-state, portfolio transactions. His practice includes a particular focus on representation of real estate investment trusts (REITs). The transactions ...

Craig E. Marcus is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Craig E., who practices law in Boston, Massachusetts, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Craig E. is held by other top lawyers in the same geographic and legal practice area.

Russell A. Gaudreau, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Russell A., who practices law in Boston, Massachusetts, has been recognized since 1987. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Russell A. is held by other top lawyers in the same geographic and legal practice area.