Katie St. John

Katie St. John joined Simon Law in April 2025, bringing experience from both the plaintiff and defense sides of litigation. She clerked at Simon Law while attending Saint Louis University School of Law, where she developed a focus on medical malpractice and personal injury. She later built her skills as a defense attorney, gaining insight into how best to serve plaintiff clients. In her final year before joining the firm, she secured a $1.1 million settlement in a workplace discrimination case, a $1.1 million verdict in a suicide wrongful death case, and a $60 million necrotizing enterocolitis verdict in Illinois.

The wrongful death verdict was the first medical malpractice plaintiff's verdict in Madison County in 14 years. Her practice at Simon Law focuses on defective products, medical malpractice, and personal injury. She holds a J.D. from Saint Louis University School of Law (with a concentration in International and Comparative Law) and a B.A. in History with honors from Eastern Illinois University (magna cum laude). She is a National Trial Lawyers Top 40 Under 40 honoree and is admitted in Missouri and Illinois and multiple federal courts.