Catherine Carroll’s practice focuses on appellate litigation in the US Supreme Court and the federal courts of appeals, as well as district court litigation and client counseling in matters raising complex legal questions. She has argued cases before the US Supreme Court and the US Courts of Appeals for the First, Second, Ninth, and District of Columbia Circuits.

Ms. Carroll’s practice spans a wide range of issues of federal law. Her recent litigation matters have involved such diverse areas as ERISA, insurance and reinsurance, tax law, antitrust law, foreign sovereign immunity, copyright, and criminal law and procedure. In addition, she frequently represents clients on a pro bono basis in cases raising significant issues of constitutional law and capital habeas procedure.

In 2014, Ms. Carroll was named a "Rising Star" by Law360 as one of the "top five appellate attorneys under 40."

Prior to joining the firm, Ms. Carroll served as a law clerk to Associate Justice David H. Souter of the US Supreme Court. Previously, she clerked for The Honorable Harry T. Edwards of the US Court of Appeals for the District of Columbia Circuit.