Over his career, Karter has tried dozens of jury and nonjury tax cases in federal courts, many for large public companies, including a number of cases involving issues of first impression. Nonetheless, he counts among his greatest successes those issues that never saw the inside of a courthouse because they were favorably resolved administratively.

Karter formerly served as a trial attorney at the U.S. Department of Justice, and since 2007 has been at the firm, where he serves as managing shareholder of the Philadelphia office. Karter focuses on litigation and applies the lessons learned to tax planning and structuring transactions. His has demonstrated a commitment to the business community and his community at large as well as maintained a successful decades-long track record in his field.