Mark Weinstein is an Associate at Keller Postman LLC. He is an experienced litigator in product liability matters and has represented plaintiffs in complex litigation for nearly a decade.  

Mark’s current practice focuses on litigating product liability cases, including representing plaintiffs in infant-formula cases related to necrotizing enterocolitis (NEC). Sadly, necrotizing enterocolitis (NEC) is a serious condition that causes pre-term infants to develop inflammation of the intestines that can lead to death or other serious lifelong complications. Given Mark’s depth of experience representing plaintiffs in product liability and toxic tort matters, his contributions include legal strategy development, motion practice, discovery, and assisting with depositions of corporate witnesses.

Before joining Keller Postman, Mark was an Associate at Weitz & Luxenberg, P.C., where he was selected as a leading member of the talcum powder trial team representing plaintiffs who were diagnosed with mesothelioma after using asbestos-containing cosmetic products. In addition to his role on the talcum powder trial team, Mark represented more than one-hundred plaintiffs at discovery and de bene esse depositions in asbestos cases. Previously, at Locks Law Firm, Mark successfully represented plaintiffs in interlocutory appeals before the Supreme Court of Pennsylvania and the Superior Court of Pennsylvania on issues related to personal jurisdiction. He was second chair in product liability trials in the Philadelphia Court of Common Pleas.

Honored for his litigation and mass tort experience, Mark was a recipient of The National Trial Lawyers: Top 40 Under 40 in New Jersey for Civil Litigation from 2017-2021.

Mark earned his law degree from the University of Wisconsin School of Law, graduating cum laude. He served as an editor of the Wisconsin International Law Journal and was honored with the Sonnet Schmidt Edmonds Award in Energy Law. He earned his undergraduate degree from The University of Michigan, graduating with distinction.

Mark is licensed to practice law in California, New Jersey, and Pennsylvania only.


"During my career, I have been honored to represent plaintiffs who were diagnosed with devastating diseases because of defective products that failed to warn of serious risks. My proudest moments have occurred when clients have expressed appreciation for my role in providing them with hope and justice, and the peace of mind that comes with knowing that their family is going to be provided for financially going forward. "

Mark Weinstein


  • J.D., University of Wisconsin School of Law
  • B.A., University of Michigan

Previous Affiliations

  • Weitz & Luxenberg
  • Locks Law Firm