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Maciej Antoniak

Senior Associate
Fax +48.22.653.4250
Maciej Antoniak is an advocate and member of the Dispute Resolution team in the Warsaw office of K&L Gates. He specializes in dispute resolution before the common courts and arbitration tribunals concerning company law, commercial contracts, liability for damages, intellectual property law (including trademarks), completion matters and labour law as well as proceedings to secure claims and enforcement proceedings. He advises clients on pre-negotiations of settlements and pre-trial negotiations.

Maciej Antoniak also advises companies on proceedings related to business crimes. He mostly represents managers and company bodies’ members in all levels of criminal proceedings acting as a counsel as well as representative of subsidiary prosecutors. Additionally he drafts company management strategies in crisis situations and advises on internal regulations, codes of conduct and compliance procedures for companies and organizations.

Professional Background

Prior to joining K&L Gates Maciej Antoniak gained experience at domestic and international law firms in Poland and Italy.


  • 2013 – First prize in the second edition of Lewiatan Arbitration Moot addressed to the trainees of the Polish advocates’ and legal advisors’ bars and organized by the Lewiatan Court of Arbitration and Young Arbitration Practitioners in Poland.

Additional Information

  • Academy of Commercial Companies, postgraduate, Warsaw School of Economics (2015)
  • Programme in International Commercial Arbitration, ICC Court of Arbitration in cooperation with Jagiellonian University in Krakow (2015)
  • American Law Studies, University of Florida Levin College of Law, Levin College of Law in cooperation with University of Warsaw (2011)
  • Italian Law Studies, Universita degli Studi di Catania in cooperation with University of Warsaw (2007)

Dispute Resolution and Arbitration

  • Represented and advised a foreign energy company in relation to numerous corporate disputes.
  • Represented one of the largest FMCG companies operating on the Polish market on numerous proceedings regarding claims resulting from acts of unfair competition.
  • Represented a foreign company operating on the Polish market in multimillion dispute regarding a distribution agreement.
  • Represented a foreign investor from the automotive industry in an arbitration dispute concerning a failure to perform an investment agreement.
  • Represented a food industry company in multimillion zloty dispute regarding claims under bank guarantee.
  • Represented an employer in numerous disputes regarding claims of former employees resulting from collective redundancies.
  • Advised a foreign insurance company on a cross border dispute on appropriate jurisdiction.

Commercial criminal proceedings

  • Advised and represented management board members of financial sector companies in proceedings related to an alleged breach of trust towards the company.
  • Advised and represented management board members of a food industry company in criminal proceedings of the Polish Central Bureau of Investigation.
  • Advised and represented a foreign company in proceedings of the Polish Internal Security Agency concerning alleged abuse and defraudation of company assets.
  • Advised and represented a Polish insurance company in criminal proceedings concerning defamation in a press article.
  • Represented management board members of limited liability companies in proceedings related to alleged inaccuracies in the company’s accounting records.
  • Advised an energy company on drafting internal regulations, codes of conduct, compliance procedures and procedures to prevent defraudation of company assets by employees.
  • Advised and represented management board members of a construction sector company in criminal proceedings concerning an alleged tender conspiracy.