Marzanna is a highly experienced litigation lawyer, advocate, licensed restructuring advisor, and commercial mediator at Centrum Mediacji Lewiatan. She has almost 20 years of professional experience in conducting commercial court proceedings in multi-jurisdictional cases, as well as in arbitration proceedings, including those based on ICC, Uncitral, and the rules of local Arbitration Tribunals. Marzanna supports clients from various business sectors, including banks, investment funds, construction, retail, and food industry companies. She has also extensive experience in matters related to intellectual property rights and trademarks, providing clients with a wide range of protection against infringements before common courts, and patent and customs authorities.

As a restructuring advisor, she advises banks on the restructuring or sale of portfolios and the recovery of non-performing loans, including those denominated in Swiss Francs. She also advises on public procurement matters, including representation before the public procurement institutions (Polish: KIO). Marzanna is regularly listed in legal rankings including the Legal 500.