About Mark
Mark Riera is a partner in the Litigation Group at Jeffer Mangels Butler & Mitchell LLP (JMBM), a full-service law firm based in Los Angeles, California. He has been practicing law for over 40 years, focusing on complex civil litigation matters. His areas of expertise include antitrust, securities fraud, RICO, False Claims Act, white-collar criminal defense, condemnation and eminent domain, and wage and hour class actions. Riera has represented clients across various sectors, such as oil and gas, banking, pharmaceuticals, medical devices, hospitality, transportation, and motor vehicles. His practice spans multiple jurisdictions, including California and international clients in Canada, Japan, Brazil, Europe, and Australia. He has handled multidistrict litigation and opt-out cases in 23 states, demonstrating his extensive experience in complex legal matters. Riera earned his Juris Doctor from Stanford Law School in 1984.
Prior to law school, he pursued a Ph.D. program at Cornell University in 1981 and graduated with a Bachelor of Arts from Pomona College in 1979. His educational background provides a strong foundation for his legal career, combining rigorous academic training with practical legal experience. Throughout his career, Riera has been involved in various stages of litigation, including hearings, appeals, negotiations, and trials. Notably, he represented the Securities Investor Protection Corporation in a landmark securities fraud and RICO action in the District Court, Ninth Circuit, and the U.S. Supreme Court. He also defended a major oil company against the threatened taking of its deep-water port terminal essential for unloading supertankers.
Riera has been recognized for his professional achievements, being named a Southern California Super Lawyer from 2007 to 2009. He has served as vice chair of the California State Bar Antitrust and Unfair Competition Section and was an executive committee member of the Los Angeles County Bar Association Antitrust Section. Additionally, he is a member of the American Bar Association's Committee on Diversity and Inclusion and was a member of the Private Antitrust Litigation Committee. Riera is admitted to practice in the State of California. His license is currently active. He is also admitted to the U.S. Supreme Court, the Supreme Court of California, the U.S.
Court of Appeals for the D.C. Circuit, the U.S. Court of Appeals for the Ninth Circuit, and the U.S. District Courts for the Central, Eastern, Northern, and Southern Districts of California. His extensive court admissions reflect his broad legal expertise and ability to represent clients in various federal and state courts. Riera is fluent in English and has been recognized for his contributions to the legal community, including his role in the California State Bar Antitrust and Unfair Competition Section and the American Bar Association's Committee on Diversity and Inclusion. His extensive experience and active involvement in professional organizations underscore his commitment to the legal profession and his clients.
