Aaron Nielson is a litigation partner in the Austin and Salt Lake City offices of Kirkland & Ellis LLP, where he focuses on litigation in the U.S. Supreme Court and in other state and federal appellate courts. As a former Solicitor General of Texas, Aaron has deep experience with challenging agency rules, First Amendment litigation and preemption, and has personally argued a half dozen appeals in the U.S. Supreme Court. While serving as Texas Solicitor General, Aaron argued more than a dozen of the State of Texas’ most important appeals, oversaw all appellate litigation for the state, regularly provided solicited briefing to the Texas Supreme Court, and was a close advisor to the Attorney General as member of the Attorney General’s Executive Team.

Aaron is an elected member of the American Law Institute and a Senior Fellow of the Administrative Conference of the United States. He also co-chairs the American Bar Association Section of Administrative Law & Regulatory Practice’s Antitrust & Trade Regulation Committee. He is also a Professor of Law at the University of Texas.

Aaron serves on the Lawyers Advisory Committee of the U.S. Court of Appeals for the Fifth Circuit. Earlier in his career, Aaron served as a clerk to Justice Samuel A. Alito Jr. of the U.S. Supreme Court, Judge Janice Rodgers Brown of the U.S. Court of Appeals for the D.C. Circuit and Judge Jerry E. Smith of the U.S. Court of Appeals for the Fifth Circuit.