M. James Dempsey

M. James Dempsey is an attorney with Cosmich Simmons & Brown, PLLC whose Hattiesburg practice focuses on mass and toxic tort litigation. His broader litigation background also includes tort and insurance matters. He represents clients in complex civil disputes where the factual record, medical or scientific issues, insurance questions, and litigation strategy can be significant to the outcome.

Dempsey earned a Bachelor of Science from Millsaps College in 1991. He later earned his law degree from Mississippi College School of Law in 2002, where he served as Vice-Chairman of the Moot Court Board. He was admitted to the Mississippi and Louisiana Bars in 2003. His academic and advocacy background supports a practice centered on complex litigation and contested tort claims.

His principal work involves mass tort and toxic tort litigation, along with tort and insurance disputes. These cases can require managing extensive records, coordinating expert issues, evaluating causation and damages, and addressing procedural questions across multiple claims or parties. Dempsey’s practice is designed for matters that demand organized case development and sustained litigation attention from early evaluation through resolution.

M. James Dempsey brings more than two decades of bar membership and a concentrated litigation background to his work. His practice in mass tort, toxic tort, and insurance-related disputes places him in matters where technical evidence and legal strategy often intersect. He helps clients assess litigation exposure, organize defenses or claims, and navigate complex civil proceedings in Mississippi, Louisiana, and other jurisdictions where admitted.

Law Office Affiliations

• Attorney, Cosmich Simmons & Brown, PLLC
• Member, The Mississippi Bar
• Member, Louisiana State Bar Association
• Member, American Bar Association
• Member, New Orleans Bar Association

Licensed State

• Mississippi
• Louisiana

Education

• Millsaps College
  Bachelor of Science (BS) in Psychology

Awards & Badges