Early in his career T.J. worked primarily on behalf of defense clients, representing companies in business disputes and negligence actions and doctors and hospitals in medical liability cases. After spending several years on the defense side, the focus of his practice shifted from representing defendants to primarily representing plaintiffs. T.J. spent a decade prosecuting nation-wide complex pharmaceutical and medical device cases against some of the largest corporations in the United States, which was the catalyst for opening Preuss | Foster in 2017.