John Carl "J.C." Zwisler

Margot M. Hammond is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Margot M., 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 Margot M. is held by other top lawyers in the same geographic and legal practice area.

Phil is a tax attorney focusing on state and local tax consulting and litigation. He has over 30 years of experience litigating and resolving major tax controversies before state supreme and appeals courts and administrative boards. While he has a solid track record of litigating cases, he has also successfully and discretely resolved hundreds of cases short of trial. His experience spans just about every area of state and local tax, including corporate income, sales and use, personal income ...

Mark Fleming is co-chair of WilmerHale's Appellate and Supreme Court Litigation Practice. He is an accomplished and well-regarded litigator who has appeared in more than 300 appellate cases and personally presented oral argument in 77 of them, including eight oral arguments before the Supreme Court of the United States. He has also argued before the Supreme Judicial Court of Massachusetts, the Massachusetts Appeals Court, and the First, Second, Third, Eighth, Ninth, Tenth, Eleventh, Federal, ...

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...

Gary is a trial attorney, representing individuals and businesses in civil litigation and before regulatory agencies, including the Securities and Exchange Commission. He represents parties in actions throughout New England, in several U.S. federal courts and in arbitration proceedings. Gary has litigated cases involving claims arising from business sales and acquisitions, securities claims, employment disputes, shareholder disputes, environmental matters and other business matters. Gary&rsqu...

Aaron A. Harsh is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Aaron A., 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 Aaron A. is held by other top lawyers in the same geographic and legal practice area.

Bradford J. Smith is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Individuals, Employment Law - Management and Litigation - Labor and Employment. Bradford J., who practices law in Boston, Massachusetts, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Bradford J. is held by other top lawyers in the same geographic and legal practice area.

John Butts is Chair of the Firm’s Commercial Litigation Group. He has prevailed in trials and arbitrations across the country for a wide range of clients in high stakes commercial disputes. John represents clients in a broad range of matters, including complex contract disputes, business torts, trade secrets cases, consumer matters, and class actions. His work has spanned a number of industries, including the automotive industry, financial services, real estate, and biotechnology.

Patrick is a seasoned trial attorney, concentrating on employment and employment-related litigation and arbitration, as well as disputes between partners and shareholders in closely held corporations. Patrick leads the firm’s trial practice. Patrick began his career as a trial attorney with the United States Department of Justice and has litigated hundreds of cases (conducting both bench and jury trials) in state and federal courts across the country. Since entering private practice, Pa...

Anthony D. Rizzotti represents a wide range of employers, including healthcare systems, hospitals, and life sciences companies in: Collective bargaining negotiations Contract administration Labor arbitrations Union elections Non-compete and trade secret litigation Wage and hour matters Appearing before the National Labor Relations Board and in state and federal courts in Massachusetts, Florida and Rhode Island, he also handles discrimination issues and claims arising under: The National Labor...