Brent Sumner

Brent Sumner is the managing partner of Sumner Law Group, LLC and a personal injury attorney representing injured people and their families in claims against insurance companies. Sumner focuses exclusively on plaintiff-side personal injury work, including commercial truck litigation, car accidents, wrongful death, and other serious injury matters. His practice includes cases involving large commercial vehicles and corporate defendants, with trial preparation playing an important role when claims cannot be resolved through settlement.

Sumner earned a B.S. in Biochemistry from the University of Missouri-Columbia in 2002 and a Juris Doctorate from Saint Louis University School of Law in 2006, where he completed a Certificate in Health Law. His scientific education and legal training provide a useful foundation for matters involving medical records, causation, injury evidence, and complex damages. That background supports detailed evaluation of the factual and technical issues that frequently arise in serious personal injury and medical-related claims.

Sumner handles truck crash cases involving eighteen-wheelers and other commercial vehicles, as well as personal injury and wrongful death litigation. His firm lists substantial case results, including multimillion-dollar settlements and verdicts in building collapse, motorcycle crash, truck crash, and other injury matters. He is admitted in Missouri and Illinois and in several federal courts, allowing him to litigate injury cases across multiple jurisdictions when the facts and parties require broader court access.

Brent Sumner has received recognition for plaintiff-side personal injury, product liability, and medical malpractice litigation, including 2025 Super Lawyers Top 50 recognition in St. Louis and Best Lawyers listings. He serves on the board of the Missouri Association of Trial Attorneys and belongs to professional trial-lawyer organizations. His practice emphasizes preparation, trial readiness, and focused advocacy for people facing serious injuries, wrongful death losses, and disputes with insurers or commercial defendants.

Law Office Affiliations

• Attorney, Sumner Law Group, LLC
• Member, The Missouri Bar
• Member, Illinois State Bar Association
• Board Member, Missouri Association of Trial Attorneys
• Member, Multi-Million Dollar Advocates Forum
• Member, Million Dollar Advocates Forum
• Member, National Trial Lawyers Top 100
• Board Member, Ladue Education Foundation
• Board Member, Cardinal Glennon Children’s Hospital, Glennon Gallop Committee

Licensed State

• Missouri
• Illinois

Education

• Saint Louis University School of Law
  Juris Doctor (JD)
• University of Missouri-Columbia
  Bachelor of Science (BS) in Biochemistry

Awards & Badges