Since 1999 he has gained professional experience providing services to governmental authorities and advising clients on different legal issues related to their day-to-day activities.

As an in-house senior lawyer for one of the largest financial institutions in the market, Mateusz has advised numerous Polish and foreign financial institutions and clients on financial market transactions and their daily legal, regulatory and compliance issues. Mateusz has also in-depth knowledge of the activity of financial institutions.

Advice on numerous innovative transactions. Supervision of numerous lawsuits related to banking products (was a member of the legal team that won the first ever Supreme Court judgment confirming the validity of the NDF transaction in Poland). Advice on the process for implementation of EU financial market regulations at banks. Preparation of standard inter-bank documentation related to various banking products. Participation in legislative work related to the implementation of EU regulations in the Polish market. Advice on numerous export credit transactions using different types of collateral. Advice on negotiations with outsourcers in the process of implementation of various banking products. Lecturer on numerous training courses and conferences (Warsaw Stock Exchange, Informedia, Warsaw Banking Institute, Kagan & Partners, CEETA). Participant in expert panel discussions (Warsaw Stock Exchange).

Bar of Legal Advisors (2008).