Collin J. Vierra

Collin Vierra is a Partner whose nationwide practice focuses on complex trial and appellate litigation, commercial and consumer mass arbitration, and counseling. Collin’s practice touches on a wide range of issues, including data privacy and AI, discrimination, products liability, commercial disputes, antitrust and unfair competition, environmental law, and government regulation. A graduate of the Massachusetts Institute of Technology (MIT), Stanford University, and Stanford Law School with degrees in engineering and economics, clients trust Collin with their most high-stakes and cutting-edge disputes. Among others, his legal acumen has been recognized by Law.com/The Recorder (Lawyer on the Fast Track), Legal 500 (recognizing Collin’s “particular prowess in mass arbitration defense”), Benchmark Litigation (identifying the “best and brightest litigators across the U.S.”), and Top Verdict (identifying Collin as having obtained one of the top verdicts in California in 2024). 

Collin chairs Eimer Stahl’s Mass Arbitration Practice Group, and clients call him a “leading lawyer” of mass arbitration defense. His creative solutions to novel arbitration issues have saved his clients tens of millions of dollars in arbitration costs and damages. A featured speaker on mass arbitration issues, he has presented to numerous institutions including the American Bar Association, the Federalist Society, the U.S. Chamber Litigation Center, Stanford Law School, MassArbCon, the Association of Corporate Counsel, and the Data Privacy and Cyber Security ConfEx. Collin has helped companies respond to over 200,000 individual demands for arbitration across numerous industries, including the social networking, consumer hardware, and consumer entertainment industries. He has obtained tens of thousands of dismissals and withdrawals of mass arbitration claims without any settlement payment or judgment to claimants, and has secured hundreds of thousands of dollars in fee-shifting awards for his corporate clients against both claimants and their counsel. Collin has arbitrated before numerous institutions including JAMS, the AAA, and NAM. His expert analysis on mass arbitration issues has been published in Law360.

Collin also co-chairs Eimer Stahl’s Data Privacy and AI Practice Group, in which role he is a trusted resource for clients navigating cutting-edge data privacy, AI, and other technological disputes. He regularly defends and counsels clients on privacy issues relating to web technologies and platforms such as Facebook/Meta Pixel, LinkedIn Insight Tag, X/Twitter Pixel, TikTok Pixel, Google Analytics, TDD/The Trade Desk Universal Pixel, ADNXS/AppNexus, New Relic, DoubleClick, OpenX, LiveRamp, TripleLift, mobile SDKs, and others. He has counseled and/or defended clients in matters involving a garden variety of state and federal data privacy statutes and constitutional claims, including under the Illinois Biometric Information Privacy Act (BIPA), the Texas Capture or Use of Biometric Identifiers Act (CUBI), the California Invasion of Privacy Act (CIPA), the California Consumer Privacy Act (CCPA), the Video Privacy Protection Act (VPPA), the Gramm-Leach-Bliley Act (GLBA), the Children’s Online Privacy Protection Act (COPPA), and others.

Collin also has substantial experience managing high-stakes discovery disputes. On the defense side, he was previously responsible for coordinating discovery in one of the nation’s largest multidistrict litigation (MDL), multistate Attorneys General (AGs), and multiagency actions. In 2024, Tennessee Governor Bill Lee appointed Collin as discovery counsel in State of Tennessee ex rel. Jonathan Skrmetti v. Meta Platforms, Inc., in which the State seeks to hold Meta responsible for the harmful impacts of Instagram on teens. In 2025, Governor Lee also appointed Collin as discovery counsel in Keira v. Tennessee Department of Children’s Services, which concerns the State’s foster care system. Collin’s insights on pressing discovery issues have also been published in Law360.

Collin has ample experience in both state and Article I and III federal court and with all aspects of litigation, including successfully trying claims from complaint to jury verdict. He has defended major public and private companies in consumer class actions, multi-district litigations (MDL), and Judicial Council Coordination Proceedings (JCCP). Collin has also defended these companies in civil and criminal investigations by the U.S. Department of Justice (DOJ), the U.S. Federal Trade Commission (FTC), the Federal Bureau of Investigation (FBI), the U.S. Securities and Exchange Commission (SEC), the U.S. Food and Drug Administration (FDA), the U.S. House of Representatives, the U.S. Senate, and the Attorneys General of more than 45 states and the District of Columbia. 

His academic background includes a Bachelor of Science in Engineering from the Massachusetts Institute of Technology (MIT) where he was a member of the Pi Tau Sigma Mechanical Engineering Honors Society and an engineering apprentice in the Pappalardo Laboratory. He is currently a member of the MIT Free Speech Alliance. He also holds a Master of Arts in Economics from Stanford University where he was a Gregory Terrill Cox Fellow in the John M. Olin Program in Law and Economics. Collin obtained his Juris Doctor from Stanford Law School.

Collin is licensed to practice in California and Texas.