Past practice has included significant Nationally litigated cases, also licensed and handles cases throughout Texas and Louisiana and in other states in association with local counsel.

Mark Simien graduated from McNeese State University in Lake Charles, Louisiana. He began working in the chemical industry as an Operator/Processor.

During his tenure with the chemical industry, Mark worked as both a relief supervisor, being placed in charge of several plant improvement projects, as well as relief supervisor for plant operations. Mark also worked as relief supervisor for the plant’s laboratory and was in charge of maintaining the scheduled and special testing necessary to maintain operations and shipments of the plant. Mark took this valuable experience with him to law school and then into practice when he joined Simien & Simien, LLC in 1994.

Mark has been a member of the Simien & Simien Law Firm since his graduation from law school. He maintains a trial and appellate practice with emphasis in the areas of Class Actions, Mass Torts, Personal Injury, Wrongful Death and other major litigation. Mark, along with other members of the firm, is involved in large scale class action and mass tort litigation. Some of the Class Action cases he has been involved in include medical devices, consumer products, telecommunications, oil and gas, fraud and other consumer-oriented litigation.

Mark was specifically requested to be involved in large scale toxic tort and environmental cases involving injury and diminution of property value. Mark was part of the team involved in the successful class action litigation for citizens of a small community which sued Conoco and Condea-Vista and received a record settlement.


  • Louisiana State University, Paul M. Hebert Law Center, Baton Rouge, Louisiana
    • Juris Doctorate – 1995
  • McNeese State University in Lake Charles, Louisiana

Professional Associations

  • Louisiana State Bar Association, Member, Present
  • Texas Bar Association, Member

Current Employment Positions

  • Attorney

Bar Admissions

  • Louisiana, 1994
  • Supreme Court of Texas