Soltysinski Kawecki & Szlezak is distinguished by its strength in financial regulatory work, financial sector M&A, and finance. The group is widely recognised as a market leader in payments services, consumer finance, and regulatory enforcement, including investigations and sanctions proceedings. Financial regulatory expert Marcin Olechowski sits at the head of the practice, which is ably supported by Wojciech Iwański, who excels in regulatory banking matters. Mateusz Blocher is the go-to advisor for consumer credit work. Former Deloitte Legal, Gizicki i Wspólnicy sp.k. practice co-head Michał Mostowik joined the practice in February 2025.
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Phone
+48 22 608 70 62
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Profile

Profile

Work Department
Banking and finance, Corporate Law and commercial transactions, Securities & Capital Markets Law
Position

Managing Partner at Sołtysiński Kawecki & Szlęzak. Dr. Olechowski specializes in civil and commercial law, banking and financial services law and regulation; M&A and international arbitration.

Career

Dr. Olechowski joined SK&S in 1996 and, since becoming a partner in 2007, coordinates the firm’s banking and financial regulation practice. He regularly advises clients on complex bank and financial regulatory matters (including acquisitions of qualifying holdings, cross-border provision of financial services, passporting and outsourcing) and represents them in proceedings in front of the Polish financial markets regulator. His transactional experience includes mergers and acquisitions, as well as financing transactions. He has also represented clients in a number of high stakes international commercial and investment arbitrations under Vienna, LCIA, UNICITRAL and ICC rules, as well as in proceedings in front of EU jurisdictions.

Languages
Polish, English, French
Memberships
- Warsaw Bar (Izba Adwokacka w Warszawie) - Assistant professor (adiunkt), Institute of Civil Law, Law Faculty, Warsaw University - Arbitrator on the roster of the Polish-German Chamber of Commerce - Member of the Association Henri Capitant des Amis de la Culture Juridique Française (General Secretary of the Polish Group in 2002-2004), Association Européenne de Droit Bancaire et Financier (AEBDF); International Bar Association; Polish Arbitration Association
Education

He is a graduate of the Faculty of Law and Administration of Warsaw University (Master’s degree, 1996; Doctorate in Law, 2001), the Warsaw School of Economics (B.A. in International Trade, 1994) and the British Centre for English and European Legal Studies at Warsaw University and Cambridge University (1995, Certificate with distinction). He has been a visiting researcher at the Max-Planck-Institut für Ausländisches und Internationales Privatrecht in Hamburg and at Paris II University, Panthéon-Assas (Boursier du Gouvernement Français).

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Testimonials

Collated independently by Legal 500 research team.

  • ‘The firm stands out thanks to its impressive expertise based on deep and well-established professional experience in the complex field of financial services. Our solicitors not only have an excellent understanding of current legislation and case law, but more importantly, they are able to translate this knowledge into effective and pragmatic action. Their in-depth knowledge of the financial sector ensures that the strategies presented are sound and based on realistic assumptions.’

  • ‘The key aspect that I value most is their individual approach to each client. The law firm focuses on understanding the situation and needs, which results in the development of tailor-made solutions. It is this commitment to detail and willingness to seek non-standard but fully legally secure paths that allows them to achieve the best possible results.’

Key clients

  • Crédit Agricole Corporate and Investment Bank Seoul Branch
  • Dowlais Group

Work highlights

Advising Intrum in all Polish law aspects of implementing the restructuring of the group, including regulatory consents, corporate reorganisation, and recapitalisation.