Mark S. Werbner

Mark S. Werbner


Mark S. Werbner

Sayles Werbner co-founder Mark S. Werbner is considered by his peers one of the nation’s most accomplished trial lawyers. His practice covers a broad range of law with an emphasis on complex business litigation, white-collar criminal defense and catastrophic personal injuries and wrongful death cases. He has represented both plaintiffs and defendants in more than 150 trials heard by juries throughout Texas and across the United States. His ability to translate high-stakes, complex legal matters into easily understandable language has enabled him to achieve an extraordinary courtroom track record.

Practice Areas: White-collar Criminal Defense, Health Care Fraud, Business and Commercial Litigation, Personal Injury and Wrongful Death

Representative Cases

Mark’s courtroom accomplishments include some of the largest jury verdicts in the country, and his work has been widely recognized by both his colleagues and the press. He is lead counsel for Terror Victims v. Arab Bank, a groundbreaking international terrorism lawsuit that has been featured on the Fox News Channel, Court TV, The Wall Street Journal, and other national and international media. In 2014, Mark helped convince a New York federal jury to issue liability findings against Arab Bank, clearing the way for a financial damages trial. The verdict represented the first time in U.S. history that a foreign bank has been found liable for materially supporting terrorism.

In May 2015, Mark and other firm lawyers won a U.S. Supreme Court ruling in a patent infringement case where the firm previously had won a  sizable judgment. The original jury verdict was recognized by Texas Lawyer newspaper as one of the top 10 verdicts statewide in 2011. When the jury award later was vacated by a federal appeals court, Mark and fellow firm lawyers successfully appealed to the U.S. Supreme Court winning a reversal by the high court.

In September 2012, Mark and fellow firm founder Dick Sayles successfully defended New York hedge fund Exis Capital Management in a high-stakes fraud lawsuit. Their work in the case helped Exis Capital earn complete dismissal of the claims on the eve of a scheduled six-week trial in New Jersey Superior Court, which spared his client from spending additional time and money in court.

Honors And Awards

Lawyer of the Year by The Best Lawyers in America for Criminal Defense: White-Collar, Dallas/Fort Worth, 2018
Top 10 Super Lawyers in Texas by Thomson Reuters, 2003, 2004, 2005, 2011, 2017
Trial Lawyer of the Year by Public Justice, 2016
Trial Lawyer of the Year by the Dallas Bar Association, 2011
Best Lawyers in America for Bet-the-Company Litigation, Commercial Litigation, White Collar Criminal Defense, 1999-2018
Fellow in the American College of Trial Lawyers, an invitation-only national legal organization
Fellow in the International Society of Barristers, an international legal organization with membership by invitation only
Advocate in the American Board of Trial Advocates, a national legal organization with membership by invitation only
Recognized as one of the nation’s Top Commercial Litigation Attorneys by Benchmark Litigation, 2013-2018

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Professional Background

Board Certified in Civil Trial Law by the Texas Board of Legal Specialization
Board Certified in Criminal Law by the Texas Board of Legal Specialization
State Bar of Texas
U.S. Supreme Court
U.S. Court of Appeals for the Federal Circuit
U.S. Court of Appeals for the Fifth Circuit
U.S. Court of Appeals for the Second Circuit
U.S. District Courts for the Northern, Southern, Eastern and Western Districts of Texas
American Bar Association
Dallas Bar Association


Southern Methodist University Dedman School of Law, J.D., cum laude
The University of Texas, B.A. with high honors 

Speaking Engagements

“Winning the Hard Cases,” Dallas Bar Association, 2017
“Trial Skills Bootcamp – Cross Examination,” Dallas Association of Young Lawyers, June 2015
“Litigating Terror Financing,” University of California Hastings School of Law, Feb. 2015
“Cross-Examination in a Criminal Case,” 6th Annual Criminal Defense Trial Skills & Trial Law Program presented by The Center for American and International Law, 2010

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