Katherine Tonneman

Katherine Tonneman

Attorney At Law

Katherine Tonneman is an associate at Ahmad Zaffarese where she focuses her practice in Workers’ Compensation defense. Prior to joining Ahmad Zaffarese, she was an Assistant District Attorney at the Philadelphia District Attorney’s Office. She prosecuted a variety of felonies, achieving favorable verdicts in both bench and jury trials.

Prior to joining the District Attorney’s office, Katherine served as a judicial law clerk for The Honorable Francis R. Hodgson in New Jersey Superior Court where she gained valuable insight into the judicial decision-making process.

Katherine is an active member of the Junior League of Philadelphia, a women’s organization devoted to improving the Philadelphia community through education and volunteerism. Katherine also serves as the community service chair for the Washington and Lee Philadelphia alumni association. She enjoys reading, cooking, and running and completes several races each year.

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Practice Areas

  • Worker's Compensation

Bar Admissions

  • Commonwealth of Pennsylvania
  • The State of New Jersey


  • William and Mary Law School
  • Washington and Lee University