Hillary O'Rourke

Zachary counsels clients in pursuing commercially relevant intellectual property protection strategies. He has extensive experience securing patents in areas including life sciences, biotechnology, bioinformatics, pharmaceuticals, semiconductor devices, and optical systems. He assists clients in pursuing effective prosecution strategies. His experience includes drafting and filing patent applications, drafting claims, responding to Office Actions, prosecuting broadening reissue applications, ...

Daryl L. Wiesen is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Patent. Daryl L., 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 Daryl L. is held by other top lawyers in the same geographic and legal practice area.

George P. Varghese draws on more than a decade of leadership experience in the US Department of Justice to advise clients on litigation involving federal and state governments, as well as on other legal challenges spanning law, policy and business.

Sean P. O'Connor is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Sean P., who practices law in Boston, Massachusetts, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sean P. is held by other top lawyers in the same geographic and legal practice area.

Malcolm B. Nicholls III is a partner in the Corporate Department. He has over fifteen years of experience in the private equity field, with a focus on national and international private equity transactions. Malcolm advises private equity fund managers, institutional investors and investment advisors on a broad range of issues, including fund formations, secondary transactions, portfolio investments, internal governance and divestments and distributions. A significant portion of Malcolm’...

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, ...

Catherine A. Bednar is a top attorney recognized by Best Lawyers in the practice area(s) of Product Liability Litigation - Defendants. Catherine A., 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 Catherine A. is held by other top lawyers in the same geographic and legal practice area.

With 25+ years of experience in government investigations and white-collar defense, Brian Kelly is a nationally recognized former federal prosecutor and high-profile trial attorney. Brian has tried numerous federal cases including, most notably, U.S. v. James “Whitey” Bulger . His seasoned judgment and strategic counsel comes from decades of experience in the U.S. Attorney’s Office in both Boston and San Diego. Brian defends corporations and executives in federal and state i...

Marko S. Zatylny is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Marko S., 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 Marko S. is held by other top lawyers in the same geographic and legal practice area.

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.