
With extensive experience in representing clients across a variety of competition matters, including cartels and abuses of dominance, the team at Hansberry Tomkiel regularly appears on behalf of clients at all levels of the domestic courts and the European Commission, as well before other Member States’ Competition Authorities. Jointly leading the team are experienced litigators Małgorzata Krasnodębska-Tomkiel, who is well-versed in new technologies and who advises clients on the competition and consumer protection laws in conjunction with this industry, and Dorothy Hansberry-Biegunska, a specialist in case strategy, who is adept in working alongside the Polish Competition Authority.
Testimonials
Collated independently by Legal 500 research team.
‘The team we worked with demonstrated exceptional expertise and a client-centric approach that truly sets them apart in the market. What particularly stands out is their in-depth industry knowledge, especially in handling complex regulatory frameworks and legal issues specific to the automotive sector.’
‘Their deep expertise in antitrust law consistently shines through, enabling them to provide thorough, precise and insightful guidance on even the most complex regulatory matters. What sets them apart from competitors is their ability to always provide timely and clear answers to any questions we raise, regardless of the complexity or urgency.’
‘Experienced and business-minded.’
‘Małgorzata Krasnodębska-Tomkiel has amazing knowledge of the Polish and European antitrust authorities.’
‘Superb competition law and litigation firm. Very efficient in delivery of outstanding work. A pleasure to work with.’
‘Dorothy Hansberry is a preeminent practitioner with excellent case management that has delivered outstanding results.’
‘Extensive experience, individual approach to the client and unique competences in antitrust law.’
Key clients
- Mastercard Europe Société Anonyme
- Verdano Investment (formerly known as Platinium Wellness)
- Fega
- Vulcan
- GVW Lowitz
- Nowa Era
- Veolia Environnement
- LPP
- Orange Polska S.A.
- Jastrzębska Spółka Węglowa S.A.
- Moritz J. Weig GmbH & Co. KG
Work highlights
- Representing Mastercard in a civil damage action case concerning an alleged violation of the EU and Polish competition laws.
- Represented Jastrzębska Spółka Węglowa S.A. in a private enforcement case.
- Representing Verdano Investment before the Competition Court and the Appellate Court in an appeal of the Competition Authority’s decision.
Lawyers

Practice head
The lawyer(s) leading their teams.
Małgorzata Krasnodębska-Tomkiel, Dorothy Hansberry-Bieguńska