Marcin specializes in business law, especially in the area of commercial companies, including current advising, transformation processes also in English. His experience includes working in District Court in Bialystok, in Commercial and Civil Division and in Students Legal Clininc where he provided legal advice for impecunious people. As a student he helped coordinating Erasmus program on the Faculty of Law as a president of Your Erasmus Support organisation. He graduated from Summer School of comparative EU-US Law conducted by Michigan State University. He speaks English and Spanish.