Mark E. Berns Mass Tort & Product Liability Attorney
Mark Berns is a St. Louis native who has dedicated his 25-year legal career to fighting for individuals harmed by dangerous products and corporate negligence. His foundation in federal practice began with a judicial clerkship under The Honorable E. Richard Webber at the U.S. District Court, Eastern District of Missouri—an experience that shaped his approach to complex litigation. Today, Mark focuses on mass tort cases on a national scale, representing individuals harmed by defective drugs, medical devices, and dangerous products.
⚖️ 25 Years of Legal Experience
⚖️️ Federal Judicial Clerkship – Hon. E. Richard Webber, U.S. District Court
“I’ve spent my career representing individuals harmed by dangerous products and corporate negligence—holding manufacturers accountable when they put profits before safety.”
Mark E. Berns
Mass Tort Attorney
Career at a Glance
Mark’s career combines federal court experience with decades of plaintiff-side litigation. His unique path—from English literature to federal clerkship to mass tort leadership—brings analytical rigor and powerful storytelling to every case.
Federal
Judicial Clerkship
U.S. District Court, E.D. Missouri
National
Mass Tort Scope
Product liability litigation nationwide
25
Years of Experience
Personal injury and products liability
STL
Native
Born, raised & practicing in St. Louis
We Don’t Just Take On Cases—We Take On Causes.
Whether you’ve been harmed by a dangerous drug, defective medical device, or unsafe product, Mark Berns doesn’t just fight for compensation—he fights to ensure what happened to you never happens to another family. With 25 years of experience and a foundation in federal court practice, Mark brings the skills and dedication needed to take on the largest corporations.
Mark’s Practice Areas
Mark focuses on mass tort and product liability cases on a national scale, representing individuals harmed by dangerous drugs, defective medical devices, and unsafe products. He also handles serious personal injury and wrongful death cases throughout Missouri.
Mass Torts
Mark represents individuals in mass tort litigation on a national scale—cases where defective products, dangerous drugs, or corporate misconduct harm thousands of people. His experience in federal court and complex litigation makes him well-suited for these high-stakes cases against major corporations.
Communities exposed to toxic chemicals, contaminated water, or hazardous waste deserve justice. Mark fights for individuals and families harmed by environmental contamination and corporate negligence.
When manufacturers put dangerous products into the marketplace, consumers suffer the consequences. Mark fights to hold these companies accountable—from defective household products to dangerous industrial equipment—ensuring they take responsibility for the harm they cause.
Pharmaceutical companies have a duty to ensure their medications are safe. When they fail to adequately test drugs or warn about dangerous side effects, Mark represents the patients who suffer the consequences—fighting for compensation and accountability.
From hip implants to surgical mesh to IVC filters, defective medical devices can cause devastating injuries. Mark represents patients harmed by devices that were rushed to market, poorly designed, or inadequately tested.
Car crashes, truck accidents, motorcycle collisions, pedestrian accidents—Mark handles serious injury and death cases arising from motor vehicle accidents, fighting to ensure victims receive full compensation for their injuries.
Law Clerk to The Honorable E. Richard Webber
United States District Court, Eastern District of Missouri
Mark gained invaluable federal court experience as a law clerk for Judge Webber, developing skills in legal research, analysis, and federal procedure that have shaped his approach to complex litigation throughout his career.
Professional Associations
Bar Association of Metropolitan St. Louis (BAMSL)
Bar Admissions
Missouri – 2003
U.S. District Court, Eastern District of Missouri – 2010
OnderLaw Awards & Recognition
Recognized as Top 1-2% of Attorneys Nationwide
Education & Background
St. Louis Native
Born & Raised
Mark was born and raised in St. Louis, and has remained committed to serving his community throughout his legal career. He continues to live in St. Louis with his wife and two daughters.
Knox College
Bachelor of Arts, English Literature – 1997
Mark’s undergraduate education in English literature developed strong analytical and communication skills—the ability to dissect complex texts and craft compelling narratives that serve him well in courtroom advocacy and legal writing.
Saint Louis University School of Law
Juris Doctor – 2001
Mark earned his law degree from SLU Law, where he also gained practical legal experience outside the classroom through his federal judicial clerkship.
Federal Judicial Clerkship
Law Clerk – Hon. E. Richard Webber
Mark served as a law clerk for The Honorable E. Richard Webber at the United States District Court, Eastern District of Missouri. This experience provided invaluable insight into federal court procedure and judicial decision-making that continues to inform his litigation strategy.
St. Louis Law Firm
Personal Injury Attorney
After his clerkship, Mark joined a well-respected St. Louis law firm where he focused on plaintiff-side personal injury litigation. He worked on a variety of serious injury and death cases including products liability, motor vehicle accidents, trucking accidents, and workplace injuries.
OnderLaw
Mass Tort Attorney
At OnderLaw, Mark focuses on representing individuals in personal injury and products liability cases, including mass tort litigation on a national scale. His combination of federal court experience and decades of plaintiff-side advocacy makes him well-suited for complex cases against major corporations.
When Your Case Becomes Our Cause
Mark Berns and the OnderLaw team don’t just fight for compensation—we fight to ensure what happened to you never happens to another family. If you’ve been harmed by a dangerous product, defective drug, or corporate negligence, let’s discuss how your case could create lasting change.
