Katarzyna Kiermasz-Olszewska


In her legal practice, Katarzyna specialises in criminal cases, including fiscal offenses, with a particular focus on issues related to economic criminal law. She also handles cases concerning family law (including divorce cases) and civil law (including cases related to the division of community property).


  • She has been collaborating with JGA Law Firm since 2009.
  • She is an experienced advocate representing clients in court proceedings.
  • She specialises in criminal law, fiscal offenses, and economic criminal law.
  • She has acquired high qualifications litigating cases before common courts.
  • She is fluent in English.