Mr Maciej Marek > Dentons > Warsaw, Poland > Lawyer Profile


Work Department



Maciej Marek has practiced competition law for over ten years. He advises on M&A transactions, represents clients before antitrust authorities and assists in implementing compliance programs.

Maciej has advised Polish and multinational leaders operating in the sectors of IT, media, telecommunications, FMCG, as well as trade and distribution, including many Fortune Global 500 companies. He has represented clients and participated in numerous proceedings before the Polish competition authority, the European Commission as well as Polish and EU courts.

His experience includes negotiating what was probably the most complex conditional merger clearance the Polish competition authority has ever issued (a tiered, mixed, structural-behavioral remedy) as well as advising on unfair competition aspects of the biggest domestic dispute over a brand. He regularly handles multijurisdictional projects, including those requiring coordination of work of multiple local lawyers, economists and IT providers.


Senior Associate at Dentons since 2017. Previously worked at Deloitte Legal and Traple Konarski Podrecki i Wspólnicy.


Polish, English.


Admitted to the Polish bar since 2015. Certified Information Privacy Professional (CIPP/E) at International Association of Privacy Professionals since 2017 and member of Allerhand Institute since 2011.


Jagiellonian University, Master of Laws. Warsaw School of Economics, “Academy of Companies” postgraduate studies.


Lawyer Rankings

Poland > Competition/antitrust

The competition practice at Dentons specialises in antitrust investigations and state aid, as well as in complex merger control cases and contentious matters involving investigations and litigation. The team is also well-situated to handle cross-border mandates. Practice head Agnieszka Stefanowicz-Barańska is active in representing clients in EU and Polish competition authority proceedings and before Polish courts. She is supported by Michał Bernat and Aleksandra Siemieniec, who focus on state aid; counsel Anna Gulińska, who is a specialist in TMT and real estate; senior associate Maciej Marek, who is skilled in chemicals and heavy industry; and Adrian Bielecki, who has a core focus on transport, logistics and life sciences.