John C. Fonseca

Tannaz Saponaro is a highly recognized family law attorney specializing in sophisticated divorce matters with complex financial family estates, child custody, alongside ancillary probate and business disputes. She was born in Tehran, Iran before moving to Los Angeles, California with her family at a young age. She attended California State University in Northridge and of L’Universite Pour Les Etudiants Etranges in Aix En Provence, France before obtaining her J.D. from Suffolk University...

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.

Jeremy M. Carroll is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Jeremy M., 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 Jeremy M. is held by other top lawyers in the same geographic and legal practice area.

Gregory D. Peterson is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law and Real Estate Law. Gregory D., who practices law in Boston, Massachusetts, has been recognized since 2008. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gregory D. is held by other top lawyers in the same geographic and legal practice area.

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

Sarah is a Fellow in the American College of Trial Lawyers. Over the last dozen years, she has led 16 patent infringement, trade secrets and invalidity trials (ten jury trials, six bench trials) across several jurisdictions, including the federal courts in Massachusetts, Florida, Delaware, Colorado, California and Texas. Read full biography: https://www.mwe.com/people/columbia-sarah-chapin/

Punam Singh Rogers is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Punam Singh, 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 Punam Singh is held by other top lawyers in the same geographic and legal practice area.

David Jellinek is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: General Practice. David, 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 David is held by other top lawyers in the same geographic and legal practice area.

Karen has a general commercial real estate development and finance practice representing owners, developers and financial institutions in construction, term and bridge financing transactions for all commercial real estate asset classes. She also leads the firm's Affordable Housing and Community Economic Development Group and has significant experience representing owners, developers, financial institutions and quasi-public agencies in HUD and Fannie Mae-financed developments, federal and stat...

Rich is the leader of Sullivan’s Tax Group. He concentrates on state tax and local tax (SALT) litigation and transactional planning involving corporate, personal income and sales/use tax matters. He has more than two decades of experience before the Massachusetts Appellate Tax Board, the Supreme Judicial Court, various state Departments of Revenue and the Internal Revenue Service on a range of issues, including corporate nexus, domicile, apportionment, step transaction, and unitary repo...