Ewa Tabor-Maciejewska

Ewa Tabor-Maciejewska

Senior Associate

Ewa Tabor-Maciejewska is a member of the Competition Law Team at the Greenberg Traurig Warsaw Office. She assists Polish and foreign clients in all aspects of competition and consumer law, in particular in M&A transactions. She also represents undertakings in proceedings before the President of the Office for Competition and Consumer Protection in cases involving anticompetitive practices, practices violating collective interests of consumers and merger control proceedings as well as in subsequent court proceedings. Prior to joining Greenberg Traurig, Ewa worked with the Warsaw office of Hogan Lovells for 7 years.


  • Abuse of dominance and restrictive practices
  • Anti-trust/Anti-competitive practices
  • Cartels
  • Competition compliance
  • Merger control
  • Dawn raids
  • Consumer law



  • Advised partners in joint venture in the merger notification proceedings before the European Commission.°
  • Represented Airbus and WorldVu Satellites in merger control proceeding before the OCCP concerning intention of creation of the joint venture.°
  • Represented Danfoss Silicon Power and Bosch Thermotechnik in merger control proceeding before the Polish Competition Authority.°
  • Advised two Polish leading banks, BGŻ BNP Paribas and mBank in their appeal to the Polish Court of Competition and Consumer Protection and subsequently before Court of Appeal and Supreme Court against a decision of the OCCP finding an infringement of EC and Polish law and imposing fines on 20 Polish banks in relation to fixing interchange fees in the payment card transactions.°
  • Advised Orlen Oil, a producer and distributor of oils and lubricants, member of PKN Orlen Group, in appeal from the OCCP’s decision concerning the alleged infringement of competition law by fixing resale prices in distribution agreement.°
  • Advised in the work for three insurance companies in proceedings before the OCCP regarding possible violations of the collective interests of consumers by charging surrender fees in the life insurance agreements with the insurance investment capital.°
  • Advised Lesaffre Polska on distribution systems and promotional actions.°
  • Advised the clothing and accessories retailer with respect to compliance of online purchase process, including terms and conditions and information provided to consumers with the consumer law.°
  • Prepared guidelines and internal instructions, in particular in case of dawn raid or participation in meeting with competitors.°

°The above representations were handled by Ms. Tabor-Maciejewska prior to her joining Greenberg Traurig Grzesiak sp.k.

Anerkennung durch den Markt

  • Member, District Chamber of Legal Advisors in Warsaw
  • Member, Competition Law Association


Akademische Ausbildung
  • Legal Advisor, 2014
  • Center of American Law Studies organised by the University of Warsaw and the University of Florida, 2010
  • Master of Law, University of Warsaw, 2010
  • Poland
  • Polnisch, Native
  • Englisch, Fluent