Katherine Barrett Riley practices in the areas of personal injury, property, wills, estates, class actions and consumer fraud cases. She is currently serving as the city attorney for the cities of Lexington and Tchula, Mississippi, as well as the attorney for the Holmes County Board of Supervisors.

Mrs. Riley played an active role during the trial of Avery v. State Farm, which resulted in one of the largest verdicts ever against an insurance company and the largest verdict in Illinois history.