Sara Jane Shanahan

Lisa’s litigation practice spans a broad range of complex environmental, energy, land use, real estate, insurance, and business matters. On behalf of private and public sector clients, she practices in state and federal courts at both the trial and appellate levels. In addition, she handles contested administrative proceedings, alternative dispute resolution matters, and sensitive regulatory compliance negotiations. She co-chairs the firm’s Environmental and Energy Law and Real Es...

Deidre J. Johnson is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law. Deidre J., 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 Deidre J. is held by other top lawyers in the same geographic and legal practice area.

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...

Rory Pheiffer works with clients to develop patent portfolios, domestically and abroad, that align with their business goals. He also counsels clients on patent opinion and product clearance matters, IP due diligence issues on the buyer and seller side, license negotiations, and trademark portfolio growth and enforcement in conjunction with building the client’s brand. Clients rely on Rory’s technical knowledge, which he honed while earning a degree in mechanical engineering from ...

Amy DeCloux Ph. Dr. is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Amy, 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 Amy is held by other top lawyers in the same geographic and legal practice area.

Christopher H. Milton has a wide variety of experience in numerous areas of real estate development, financing, entitlements and operations. Chris represents regional, national and foreign owners, developers and investors in connection with all aspects of real estate development from acquisition through zoning relief, subdivision, permitting, environmental remediation and construction. Chris represents lenders and investors in multi-party real estate based financial transactions and related l...

R. Daniel O'Connor is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Banking and Finance and Litigation - Regulatory Enforcement (SEC, Telecom, Energy). R. Daniel, 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 R. Daniel 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...

Mark Matuschak is an experienced trial lawyer focusing on trademark, trade dress, patent and trade secret litigation. He is often brought in shortly before trial as lead counsel to craft winning strategies in difficult-to-win cases and jurisdictions and on appeals. Mr. Matuschak has tried dozens of cases, obtained the first-ever jury verdict of patent invalidity in the Eastern District of Texas, won a number of notable trademark and trade dress cases in the financial services, consumer produc...

Debra Dyleski-Najjar is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Debra, who practices law in North Andover, Massachusetts, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Debra is held by other top lawyers in the same geographic and legal practice area.