Mark Werbner is certified in criminal law by the Texas Board of Specialization, and his criminal defense practice covers a broad range of federal and state matters. He has been named one of The Best Lawyers in America in criminal defense. In 2009, he was again listed among The Best Lawyers of America in the area of white collar criminal defense. During his 25 years of practice, he has represented numerous corporate executives and businessmen who were subjects or targets of federal, state or administrative investigations. He has experience in the defense contracting arena, and the health care and securities and banking industries. Werbner also has extensive experience in defending corporate clients who have been subjects of investigations by the Department of Human Services, Office of Inspector General, relating to alleged Medicare fraud and the SEC in securities investigation.

Werbner has secured acquittals in numerous high-profile cases including for those clients accused of money laundering, tax evasion, bank fraud, mail and wire fraud, and murder.