Marcin specializes in civil and commercial law, with a particular focus on white-collar crime and economic disputes. He advises businesses and individuals on criminal risk in commercial activities, combining transactional insight with litigation expertise.

He represents clients in complex criminal proceedings, particularly in cases involving economic offences, corporate disputes, and regulatory exposure. He also advises on M&A transactions and investment processes, ensuring alignment between deal structuring and legal risk management.

Marcin has extensive experience in representing clients in high-stakes civil and criminal matters and has served on management and supervisory boards of commercial companies, including entities listed on the Warsaw Stock Exchange. He also acted as Chairman of the Appellate Court of the Polish Volleyball Federation.

He gained his experience as a partner in leading law firms, where he focused on comprehensive legal support for entrepreneurs and representation in complex commercial and white-collar cases.