Dentons

Competition

Maciej Marek is a counsel in Dentons' Warsaw office and a member of the Competition practice team. For more than a decade, he has represented clients before competition authorities, advised on mergers and acquisitions and helped develop compliance programs.

Maciej has advised national and international leaders across the digital, IT, e-commerce, consumer electronics, industrial, chemical, and energy sectors, including numerous Fortune Global 500 companies. He has represented clients in many proceedings before the Office of Competition and Consumer Protection, the European Commission, as well as before Polish and EU courts.

His experience includes negotiating complex conditional merger approvals, representing in proceedings to amend conditional merger approvals, advising on the Digital Markets Act and Digital Services Act, conducting internal competition law compliance audits, and participating in a precedent-setting trials, including on the liability of Internet intermediaries. Maciej has also led a number of multi-jurisdictional projects requiring the coordination of economists, legal tech service providers and lawyers from different jurisdictions or different specialties.

Counsel at Dentons since 2023 (with the law firm since  2017).

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.