“Brendan Quigley is terrific – a star.”
—The Legal 500 U.S. 2026
“Brendan is simply outstanding across the board.”
—Chambers USA 2026
“Not only is Brendan well-versed in the law but he is very practical and comes to us with real and practical solutions.”
—Chambers USA 2026
“Smart and even-keeled. He has a broad strategic viewpoint.”
—Chambers USA 2025
“Brendan is an excellent attorney who draws on trial experience to help clients navigate disputes in anticipation of litigation and can see things through to an effective solution.”
—Chambers USA 2024
Brendan Quigley is a first-chair trial lawyer who represents companies, boards, and executives in high-stakes government litigation and investigations and in commercial disputes. An experienced advocate who has conducted over a dozen trials, a former U.S. government prosecutor in the Southern District of New York, and a U.S. Marine combat veteran, Brendan brings a combination of courtroom skill, prosecutorial insight, and battle-tested judgment to every matter. Described in industry publications as “highly skilled” with a “methodical analytical approach,” (Chambers USA 2026), he combines the courtroom expertise of “a really good advocate” and a “great defense lawyer” (Chambers USA 2025) with “a calm approach to advising clients,” providing “real and practical solutions” (Chambers USA 2026).
Before joining Baker Botts, Brendan served as an Assistant United States Attorney in the Southern District of New York, investigating and prosecuting complex cases in two of the Office's most elite sections: the Securities and Commodities Fraud Unit and the Terrorism and International Narcotics Unit. During his seven years as an AUSA, Brendan gained extensive first-chair trial and appellate experience, trying 12 cases to verdict, including numerous complex, multi-week trials, and briefing and/or arguing 10 appeals before the Second Circuit. This experience gives him critical insight into how federal prosecutors build cases, evaluate evidence, and make charging decisions—insight he now draws on to advise, advocate for, and protect his clients.
Government and Internal Investigations/Enforcement: Brendan's investigations practice focuses on white-collar criminal defense and investigations, securities and commodities enforcement, and False Claims Act investigations and litigation. Having first-chaired over a dozen trials, he has the experience and know-how to fight the government in court, but many of his most rewarding representations have involved helping clients resolve sensitive matters at an early stage, before charges were ever brought, through proactive advocacy and strategic counsel.
Commercial Disputes: Brendan’s trial experience also extends to high-stakes commercial litigation. He represents clients as both plaintiffs and defendants in complex disputes, focusing on matters in the energy, technology, and financial services industries. His recent successes include prevailing at trial in the Delaware Court of Chancery in a dispute among shareholders of a closely held corporation, serving as key member of a team that prevailed in an intercreditor indenture litigation in federal bankruptcy court, and successfully defeating a securities fraud lawsuit against a fintech company in New York state court.
Earlier in his legal career, Brendan spent a year clerking for the Honorable Joseph F. Bianco, then a U.S. District Judge in the Eastern District of New York, now of the Second Circuit.
Brendan also served as an active-duty combat-arms officer in the U.S. Marine Corps between 2001 and 2005, receiving an honorable discharge as a Marine Captain. During his service, he completed two tours of combat duty in Iraq and learned important lessons about preparation, calmness under pressure, and commitment to mission, which he continues to draw on today.
White Collar Criminal Defense and Investigations
Securities and Commodities Enforcement
False Claims Act Litigation and Investigations
Commercial Disputes
Significant Securities Fraud Prosecutions (prior to joining Baker Botts)
Other Significant Prosecutions (prior to joining Baker Botts)
Named a "Leading Partner" in Corporate Investigations and White-collar Criminal Defense: Advice to Corporates by The Legal 500 U.S., 2026
Listed as a "Next Generation Partner" in Corporate Investigations & White-Collar Criminal Defense by The Legal 500 U.S., 2025
Recognized in Litigation: White-Collar Crime & Government Investigations by Chambers USA, 2023, 2024, 2025 & 2026