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Shannon defends clients in complex, high-exposure toxic tort cases.

With more than 15 years of experience in mass tort litigation, Shannon regularly represents clients in some of the country’s most challenging jurisdictions in Illinois and eastern Missouri, where he has an extensive network. As part of national coordinating counsel teams, he manages a high caseload volume for clients.

Shannon has conducted hundreds of depositions nationwide of plaintiffs, fact witnesses, corporate representatives and expert witnesses including medical professionals, scientists and industrial hygienists. He regards each deposition as its own miniature trial, since the testimony can often be preserved for trial and read to jurors should the witnesses be unavailable to testify. He is in contact with clients frequently to ensure a complete strategy that fits with their overall approach to litigation.

In addition to his toxic tort work, Shannon also has extensive experience with product liability, personal injury, wrongful death and premises liability litigation. He has represented foreign and domestic automobile manufacturers, automobile parts suppliers, telecommunications companies and various manufacturing facilities in these suits.

Shannon is known for his ability to handle especially difficult cases from start to finish, and he truly enjoys interacting and communicating with clients and values the trust they place in him. Shannon places a high priority on making sure clients are informed, involved and fully aware of litigation strategy and its likely results.




  • J.D., Valparaiso University Law School
  • B.A., Fordham University


  • Missouri
  • Illinois

*Contact Shannon to set up an in-person consultation by appointment in the St. Louis office.
  • Manages complex lawsuits from inception through completion with a high-volume caseload.
  • Serves as first-chair deposition counsel in high-exposure, high-value personal injury, wrongful death, premises liability and products liability litigation.
  • Directs and manages investigators and expert witnesses, including medical doctors, epidemiologists and industrial hygienists, at depositions and during trial preparation.
  • Represented foreign and domestic automobile manufacturers, automobile parts suppliers, telecommunications companies and various manufacturing facilities in product liability cases.
  • Won defense verdict on behalf of multinational food manufacturer in alleged food poisoning lawsuit.
  • Won three dismissals in Madison County, Illinois by tracing merger documents to show that successor corporation was not legally responsible for predecessor's liabilities.
Outside the Office

With two kids, Shannon enjoys family time and activities, especially speedskating. The family are heavily involved with St. Louis’s Gateway Speedskating Club and train from September to April every year. Shannon and his son have even competed and qualified for national speedskating meets, and his daughter competes as well.

As a former NCAA Division I student-athlete who played baseball at Fordham University—the winningest Division I baseball program in the country—Shannon also enjoys coaching and instructing ballplayers of all ages with ambitions to continue their career into college. He provides private lessons and mentorship to student athletes who intend to play baseball and softball at a highly competitive level.

Community Leadership

Shannon has served on the board of directors for the Kirkwood Athletic Association since 2017, with a focus on baseball. He also handles social media for the Gateway Speedskating Club.