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Trial and Appellate Attorney Mark Riera Joins Jeffer Mangels Butler & Mitchell LLP

LOS ANGELES—Trial and appellate attorney Mark Riera has joined Jeffer Mangels Butler & Mitchell LLP (JMBM) in its Los Angeles office. Previously with Akerman, Riera has significant experience in antitrust, trade regulation, class actions, trust and estates litigation, energy and securities matters, including appeals. He has represented clients in matters involving securities fraud, criminal defense, the Racketeer Influenced and Corrupt Organizations Act (RICO), and the False Claims Act (FCA).

“Mark Riera is an outstanding addition to our litigation team,” said JMBM hiring partner Stan Gibson. “His wealth of knowledge and breadth of experience will be a tremendous resource to our clients.”

Riera has handled multi-district litigation and opt-out cases in 23 states and has represented clients worldwide. His clients come from a wide range of industries including pharmaceutical, oil and gas, hospitality, medical devices, and transportation.

“JMBM’s lawyers are known as aggressive litigators and excellent problem solvers,” he said. “I am pleased to join them.”

Riera received a J.D. from Stanford Law School and a B.A. from Pomona College. He is a member of the American Bar Association’s Committee on Diversity and Inclusion, and has served as the Vice-Chair of the California State Bar’s Section on Antitrust and Unfair Competition.

About JMBM
Jeffer Mangels Butler & Mitchell LLP is a full-service law firm committed to providing clients with outstanding results. JMBM’s Litigation Department brings a business focus to litigation, helping businesses, entrepreneurs, and individuals solve problems and win cases. From our offices in Los Angeles, San Francisco and Orange County, we serve our clients’ needs worldwide. For more information visit

Stan Gibson

Mark Riera