Mark Riera

Mark Riera is a Los Angeles litigation attorney with experience in antitrust, securities fraud, Racketeer Influenced and Corrupt Organizations Act matters, False Claims Act cases, white-collar criminal defense, eminent domain, and wage and hour class actions. His work spans the oil and gas, banking, pharmaceutical, medical device, hospitality, transportation, and motor vehicle sectors. He represents clients in complex disputes that often involve extensive records, multiple jurisdictions, and significant business concerns.

Mark earned a B.A. from Pomona College in 1979 and pursued Ph.D. studies at Cornell University in 1981. He received his J.D. from Stanford Law School in 1984. His academic background supports a careful approach to legal analysis, case strategy, and complex commercial issues. He is admitted to the State Bar of California and practices before the U.S. Supreme Court, the Supreme Court of California, and several federal appellate and district courts.

Mark has handled multidistrict antitrust litigation and opt-out cases in 23 states, along with matters involving clients in Canada, Japan, Brazil, Europe, and Australia. His representative experience includes defending a pharmaceutical corporation against price-fixing claims and representing the Securities Investor Protection Corporation in securities fraud and RICO litigation. He has also defended False Claims Act allegations, challenged a threatened taking of an oil terminal, and handled wage classification and overtime disputes.

Mark Riera has held leadership roles in the California State Bar Antitrust and Unfair Competition Section, including service as vice chair and editor of its official publication, Competition. He also served on the executive committee of the Los Angeles County Bar Association Antitrust Section and has participated in American Bar Association committees. Recognized as a Southern California Super Lawyer from 2007 through 2009, he brings broad litigation experience and practical judgment to high-stakes disputes.

Law Office Affiliations

• Partner, Jeffer Mangels & Mitchell LLP
• Vice Chair, The State Bar of California, Antitrust and Unfair Competition Section
• Member, American Bar Association

Licensed State

• California

Education

• Stanford Law School
  Juris Doctor (JD)
• Cornell University
  Doctor of Philosophy (PhD)
• Pomona College
  Bachelor of Arts (BA)