Daniella Helena Cass

Daniella Cass is an associate in the Washington, D.C. office of Gibson Dunn. She practices in the firm’s Litigation Department and is a member of the firm’s Appellate and Constitutional Law Practice Group and Administrative Law and Regulatory Practice Group.

Prior to joining the firm, Daniella served as a law clerk to Justice Samuel A. Alito of the U.S. Supreme Court. She also served as a law clerk to Judge Paul B. Matey on the U.S. Court of Appeals for the Third Circuit and to Judge Gerald B. Tjoflat on the U.S. Court of Appeals for the Eleventh Circuit. During her 2L summer, she interned for Judge Neomi J. Rao of the U.S. Court of Appeals for the District of Columbia Circuit.

Daniella earned her J.D. in 2022 from the University of Pennsylvania Law School, where she received the Blank Rome Alvin Ackerman Prize, as well as the Toll Public Interest Center Exceptional Pro Bono Service Award. She served as a Senior Editor of the University of Pennsylvania Journal of Constitutional Law. In 2019, Daniella graduated magna cum laude with Honors in Politics, Philosophy, and Economics from the University of Pennsylvania, where she received the Award for Distinguished Research for her honors thesis The Politicization of the Supreme Court.

She is a member of the D.C. and Pennsylvania Bars and is admitted to practice before the U.S. Courts of Appeals for the Third and Ninth Circuits.

Capabilities

• Appellate and Constitutional Law
• Administrative Law and Regulatory Practice
• Litigation

Credentials

Education:

• University of Pennsylvania - 2022 Juris Doctor
• University of Pennsylvania - 2019 Bachelor of Arts

Admissions:

• District of Columbia Bar
• Pennsylvania Bar

Clerkships:

• US Supreme Court, Hon. Samuel A. Alito, 2024 - 2025
• US Court of Appeals, 3rd Circuit, Hon. Paul B. Matey, 2023 - 2024
• US Court of Appeals, 11th Circuit, Hon. Gerald B. Tjoflat, 2022 - 2023