Untress Quinn

Shareholder in O’Fallon, IL

Untress Quinn joined Sandberg Phoenix in 2016 and splits his time between the O’Fallon, Edwardsville and St. Louis Offices. He focuses his legal practice on defending complex mental health cases, civil rights, product liability and medical malpractice litigation. He has defended multiple catastrophic and complex litigation cases involving civil rights, labor and employment, product liability and medical malpractice cases which included neurologic, obstetric, neonatal, pediatric, cardio-thoracic and other traumatic injuries. Untress serves as the Team Leader for the Correctional Medicine industry team.

As a Registered Nurse with experience in direct patient care, Untress understands the complex issues at play in medical malpractice litigation, which helps him better guide his clients through difficult legal issues. 

Outside the office, he enjoys playing golf and spending time mentoring youth, including his own. Untress also plays trumpet for local blues and jazz bands and enjoys public speaking, drawing, exercise training, cycling and photography.


Commercial Litigation Correctional Medicine Labor & Employment Counseling Medical Malpractice Defense Product & Toxic Tort Liability


Drugs & Pharmaceuticals Hospitals Long-term Care & Senior Living Medical Devices Physicians & Allied Health Professionals