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Kathryn Warner – Associate


Kathryn Warner (formerly Witham) represents individuals and businesses involved in tax controversies with the Internal Revenue Service (“IRS”) and Massachusetts Department of Revenue (“DOR”). Kathryn is a graduate of Suffolk University Law School where she served as President of the Moot Court Honor Board and Journal of Trial and Appellate Advocacy. She previously served as a legal intern for the United States Attorney.


Kathryn counsels clients with federal and state tax controversies, including:

  • Audit and examination defense, including calculation of correct tax liability and minimizing penalties and interest
  • Collection matters, including Installment Agreements and Offers in Compromise, and Innocent Spouse Relief Requests
  • FBAR (Report of Foreign Bank and Financial Accounts) requirements
  • Assisting taxpayers to become compliant with their tax obligations through voluntary disclosure programs

Previous Experience

Suffolk University Law School (Fall 2018)
  • Criminal Law Teaching Assistant
United States Attorney’s Office (Summer 2017)
  • Legal Intern, Major Crimes Unit of the Criminal Division


  • Juris Prudence Award for Highest Grade, Banking Law, Fall 2017
  • Juris Prudence Award for Highest Grade, Criminal Law, Fall 2016
  • Distinguished Oral Argument in Legal Practice Skills, Spring 2017
  • Honorable Mention for Best Legal Brief in Legal Practice Skills, Spring 2017