Leonard Gail
Founding Partner
Massey & Gail LLP
United States
Lawyers
Kylie Chiseul Kim
Kylie Chiseul Kim is a partner in the Washington, D.C. office of Massey & Gail LLP. She represents clients in high-stakes trial and appellate litigation, as well as complex proceedings before administrative agencies.
Kylie focuses on disputes involving emerging technologies and novel regulatory issues. She has challenged the SEC’s authority over digital assets, prosecuted antitrust claims in technology-driven markets, and represented Amazon’s music streaming business in a rate-setting proceeding before the U.S. Copyright Royalty Board.
Her work has been recognized by The American Lawyer as part of its Litigator of the Week series following a Ninth Circuit victory in a federal preemption challenge.
Before entering private practice, Kylie clerked for Hon. Charles R. Wilson, U.S. Court of Appeals for the Eleventh Circuit, and Hon. Steven D. Merryday, U.S. District Court for the Middle District of Florida.
Kylie earned her J.D. from Harvard Law School, where she served as Captain of the Willem C. Vis International Commercial Arbitration Moot Team, Executive Online Editor of the Harvard International Law Journal, and Article Editor of the Harvard Environmental Law Review.
Jonathan Massey
Jonathan Massey is a founding partner of Massey & Gail and a nationally recognized appellate and strategic litigation lawyer with more than three decades of experience managing high-stakes matters nationwide.
Jonathan focuses on complex litigation involving cutting-edge legal questions. He represents clients before trial and appellate courts across the country, including the Supreme Court of the United States. Clients turn to Jonathan for clear legal framing, strategic judgment, and credibility in cases where legal questions will drive the outcome. He also has an extensive practice of counseling clients on sensitive matters outside the litigation context.
Jonathan has argued more than 70 cases in federal and state courts, including three before the Supreme Court, and has filed over 90 briefs in the Court. His practice also includes representing clients before the U.S. Department of Justice, Federal Communications Commission, Federal Trade Commission, Environmental Protection Agency, and other agencies, particularly in matters involving overlapping litigation and regulatory risk.
His experience spans antitrust, telecommunications, financial services, securities, intellectual property, tax, environmental law, and constitutional issues. His clients include leading corporations, universities, foreign governments, U.S. states, and senior public officials, including former Vice President Al Gore in Bush v. Gore.
Jonathan served as a law clerk to Justice William J. Brennan, Jr. of the Supreme Court of the United States and Judge Abner J. Mikva of the U.S. Court of Appeals for the D.C. Circuit. He later served as Deputy Special Counsel to Independent Counsel Lawrence Walsh.
While at Harvard Law School, he served as a research assistant to Laurence Tribe and was an editor of the Harvard Law Review. He has taught appellate advocacy and related subjects at Harvard Law School and Georgetown University Law Center and has served as an instructor for the D.C. Bar. He is an elected member of The American Law Institute.
Jonathan S. Massey
Jonathan Massey is a founding partner of Massey & Gail and a nationally recognized appellate and strategic litigation lawyer with more than three decades of experience managing high-stakes matters nationwide.
Jonathan focuses on complex litigation involving cutting-edge legal questions. He represents clients before trial and appellate courts across the country, including the Supreme Court of the United States. Clients turn to Jonathan for clear legal framing, strategic judgment, and credibility in cases where legal questions will drive the outcome. He also has an extensive practice of counseling clients on sensitive matters outside the litigation context.
Jonathan has argued more than 70 cases in federal and state courts, including three before the Supreme Court, and has filed over 90 briefs in the Court. His practice also includes representing clients before the U.S. Department of Justice, Federal Communications Commission, Federal Trade Commission, Environmental Protection Agency, and other agencies, particularly in matters involving overlapping litigation and regulatory risk.
His experience spans antitrust, telecommunications, financial services, securities, intellectual property, tax, environmental law, and constitutional issues. His clients include leading corporations, universities, foreign governments, U.S. states, and senior public officials, including former Vice President Al Gore in Bush v. Gore.
Jonathan served as a law clerk to Justice William J. Brennan, Jr. of the Supreme Court of the United States and Judge Abner J. Mikva of the U.S. Court of Appeals for the D.C. Circuit. He later served as Deputy Special Counsel to Independent Counsel Lawrence Walsh.
While at Harvard Law School, he served as a research assistant to Laurence Tribe and was an editor of the Harvard Law Review. He has taught appellate advocacy and related subjects at Harvard Law School and Georgetown University Law Center and has served as an instructor for the D.C. Bar. He is an elected member of The American Law Institute.
Bret Vallacher
Bret Vallacher is a commercial litigator who represents companies, executives, and government entities in complex disputes and appeals. His experience spans a wide range of matters, including contract, securities, antitrust, employment, trade secret, trademark, deceptive trade practices, fraud, defamation, election law, and constitutional claims.
Before joining the firm, Bret served as a Trial Attorney in the Commercial Litigation Branch of the United States Department of Justice, where he represented the United States in federal trial and appellate courts in matters involving breach of contract, constitutional takings, employment disputes, bid protests, and international trade.
Earlier in his career, Bret clerked for federal trial and appellate judges and practiced at Boies Schiller Flexner LLP and Jones Day.
Bret received his J.D. from Stanford Law School, where he worked in the Stanford Criminal Defense Clinic and served as a judicial extern to the Navy-Marine Corps Court of Criminal Appeals.