Arthur Halliday is an associate in Gibson Dunn’s Los Angeles office, where he practices as an environmental litigator. He represents clients in complex litigation, government investigations, and compliance matters primarily relating to environmental law.
Arthur’s representative environmental experience includes:
- Ongoing representation of a power company in civil and regulatory matters relating to a battery energy storage facility.
- Representation of an aerospace company through a federal jury trial in a class action alleging groundwater contamination.
- Ongoing representation of an electric vehicle manufacturer in complex litigation.
- Provided compliance advice and interfaced with the California Department of Justice on behalf of a client facing a CERCLA investigation.
- Pro bono representation of a non-profit related to the conservation of land in California.
- Pro bono representation of a non-profit facing a Prop. 65 claim.
Arthur maintains an active pro bono practice with a focus on immigration and immigrants’ rights issues. He currently represents immigration legal service providers in challenges to the federal government’s decisions to end programs providing legal representation to unaccompanied non-citizen children and legal orientation programs to non-citizens. Additionally, Arthur represents individuals seeking asylum and other immigration relief in the United States. He is a member of the firm’s Immigration Task Force.
Arthur earned his law degree in 2022 from Columbia Law School, where he was named a James Kent Scholar and awarded the Ruth Bader Ginsburg Prize. At Columbia, Arthur worked as an Articles Editor on the Columbia Journal of Law & Social Problems. He also served as co-president of the California Society, as a research assistant for Professor Elizabeth Emens, and as a teaching assistant for Professor Jane Ginsburg and Professor Michael Gerrard.
Arthur graduated from Wesleyan University in 2016, earning a bachelor’s degree with High Honors in the College of Social Studies.
Arthur is a member of the State Bar of California and is admitted to practice before the United States District Courts for the Central, Northern, and Southern Districts of California.
Capabilities
- Environmental Litigation and Mass Tort
- Administrative Law and Regulatory Practice
- Appellate and Constitutional Law
- Energy Regulation and Litigation
- Energy and Infrastructure
- Power and Renewables
Credentials
Education:
- Columbia University - 2022 Juris Doctor
- Wesleyan University - 2016 Bachelor of Arts
Admissions:
- California Bar