Douglas C. Monsour, or Doug Monsour, is a trial lawyer who handles important and significant injury cases in Texas and across the nation. He is one of a handful of trial lawyers who have successfully tried multiple pharmaceutical, medical device, and mass tort product liability cases as the lead lawyer. He also vigorously represents injured oil field workers, victims of 18-wheeler wrecks, industrial accident victims, and those that have been severely burned.


Doug is known for his abilities in the courtroom. Recently, Doug secured two major trial victories in the 3M Combat Arms version 2 earplug litigation. On December 10, 2021, a Tallahassee, Florida Federal Court jury awarded U.S. Army veteran T.J. Finley $22.5 million for hearing loss suffered due to his defective Combat Arms version 2 earplugs. A few months later, on April 29, 2022, a Federal Court jury in Gainesville, Florida awarded $2.2 million to U.S. Army veteran Jonathan Vaughn for his hearing loss suffered from wearing the defective Combat Arms version 2 earplugs. The Finley v. 3M verdict was listed by The National Law Journal as one of the Top 100 verdicts of 2021. In fact, this verdict was the very first verdict in the entire 3M litigation to ever make the Top 100 list. Both trials were defended by international law firm Kirkland & Ellis.

Previously, in November 2014, Doug served as the lead lawyer in a transvaginal mesh case involving four women implanted with the Obtryx sling system to treat stress urinary incontinence. After an almost month-long trial, the jury returned a verdict for the plaintiffs in the amount of $18.5 million. This was the first verdict against Boston Scientific in the Federal Multi-District Litigation (MDL) for any of its incontinence sling products.(Wilson et al v. Boston Scientific Corp., WV, MDL 2326).

In 2004, Doug's trial skills were tested by pharmaceutical giant Wyeth. He served as lead lawyer in two very significant Fen-Phen cases. In the first case, Wyeth hired world famous defense lawyer Dan Webb of Chicago's legal Goliath, Winston & Strawn, to defend them. In the third week of the trial, Wyeth relented and settled for a confidential sum. In the second case, Wyeth retained Houston mega-firm Vinson & Elkins to defend them. Wyeth again relented, and just before closing arguments settled for a confidential sum.

In addition to these trials, Doug has tried over thirty cases of various types including oil field injuries, defective drugs, defective medical devices, medical malpractice, trucking (18-wheeler) wrecks, industrial accidents, car wrecks, civil rights and malicious prosecution.


Doug is triple board certified. He is Board Certified in Personal Injury Trail Law by the Texas Board of Legal Specialization. In addition, he is a Board Certified as a Civil Trial Advocate by the National Board of Trial Advocacy. Furthermore, he is Board Certified in Civil Pretrial Practice Advocacy by the National Board of Civil Pretrial Practice Advocacy.

In 2000, Doug became a member of the Million Dollar Advocates Forum an organization reserved for lawyers who have secured more than $1,000,000 in a single case. In 2004, 2007, 2008, and 2009, Doug was selected in Texas Monthly magazine as one of the "Rising Star" Lawyers in Texas. From 2009 through 2022 he has been selected as a Super Lawyer in Texas Monthly magazine every year. He has also been voted the Best Lawyer in Longview, Texas by the Longview New-Journal.


Doug's abilities as lawyer have repeatedly been recognized by judges across the country as he has been appointed to help lead many significant litigations.

Doug is currently serving on the Executive Committee for the 3M Combat Arms version 2 earplug litigation. In addition, Doug is the Chair of Science & Experts Subcommittee. Doug was appointed to both positions by U.S. District Judge M. Casey Rodgers. Doug's work in the 3M litigation has included numerous corporate depositions, expert depositions, and development of the entire plaintiffs' slate of expert. In fact, the depositions taken by Doug have been used in every trial against 3M involving the CAEv2 earplug.

Prior to his current role in the 3M earplug litigation, Doug has held the following appointed positions (in chronological order):

In 2001, he was appointed to the Plaintiff's Liaison Committee for Fen-Phen Region 1. In this capacity, he served as the lead lawyer for all Fen-Phen cases in Northeast Texas. Doug tried the only two Round 2 cases to go to trial in Region 1.

In April 2008, United States Federal District Judge Don Middlebrooks of Southern District of Florida appointed Doug to serve on the Plaintiff's Steering Committee of In re Trasylol Litigation. In this capacity, Doug traveled across America, and to Europe, to investigate the conduct of Bayer concerning its drug, Trasylol. He took the depositions of many of the most important Bayer executives in the litigation.

In 2011, Judge Rebecca Pallmeyer appointed Doug as a member of the Plaintiff's steering committee for MDL 2172: In re: Zimmer NexGen Knee Products Liability Litigation, United States District Court, Northern District of Illinois. In this litigation, Doug has deposed many significant witnesses for the plaintiffs.

In 2012, Doug was appointed to the Plaintiffs' Steering Committee for the Transvaginal Mesh Litigation by Federal Judge Joseph R. Goodwin. In that capacity, Doug has taken the lead in many critical depositions against Boston Scientific Corp. and Ethicon (a Johnson and Johnson company). He has also tried two mesh cases as the lead lawyer.


Rice University, 1991. B.A. in Economics and Political Science.

Texas Tech School of Law, 1994. Magna Cum Laude. Executive Board of Editors, Texas Tech Law Review.


Since 1994, Doug has been married to the former Sarah Lenhart. They have been blessed with three wonderful children, two sons and a daughter. Doug has coached his sons in T-ball, baseball, basketball, and soccer. Doug's favorite activities with his family are hunting with his sons, spending time at the lake, traveling, and being a frustrated Dallas Cowboys fan. All three of Doug's children attend or graduated from the University of Texas in Austin. Sarah Monsour is also a Longhorn. As might be expected, Doug is a dedicated Longhorn fan!


The Monsour Law Firm will represent you with the diligence and determination you deserve. We will provide a complimentary case review and recommend a course of action to help you receive the correct compensation for your injuries and financial losses. We can help.​