Dr iur Michael Mráz > Wenger Vieli Ltd > Zurich, Switzerland > Lawyer Profile

Wenger Vieli Ltd
Michael Mráz photo

Work Department

Litigation & Arbitration; White-Collar Crime.


Michael Mráz deals with white-collar crime, international judicial and mutual administrative assistance as well as matters relating to the Financial Market Supervisory Authority (FINMA). He specializes in advising and representing clients in criminal and regulatory proceedings.

Michael Mráz represents individuals and companies who are themselves involved in criminal proceedings, as well as those who have been harmed by a criminal offense. As part of judicial and mutual administrative assistance, he assists persons in matters of extradition and the transmission of information to foreign authorities. Another focus of his work is providing advice and support to clients in their compliance and prevention efforts as well as internal investigations.

Michael Mráz also represents parties as their lawyer in commercial matters before Swiss courts and national and international arbitral tribunals. In addition, he advises Swiss clients with business activities in Eastern Europe as well as foreign clients, specifically from the Czech Republic, Russia and Ukraine.

Michael Mráz is also a lecturer and author in his fields of expertise.


Since 2009, Partner at Wenger & Vieli Ltd.; 2001-2008, Lawyer at Wenger & Vieli Ltd.; 2001-2003, Research Fellow and Teaching Assistant at the University of Lucerne; 1999-2001, Junior Lawyer at Wenger & Vieli Ltd.; 1997-1999, Federal Office for Foreign Economic Affairs, Department “Law and International Investments”; 1995-1997, Assistant at the Institute for Public International Law of the University of Zurich (Prof Thürer).


German, English, French, Russian and Czech.


Swiss Bar Association (SAV); Zurich Bar Association (ZAV); Swiss Arbitration Association (ASA).


2015, Certified Specialist SBA Criminal Law; 2002, University of Zurich (Dr. iur.); 2001, Admission to the Bar; 1995, University of Zurich (lic. iur.).

Lawyer Rankings

Switzerland > Leading firms: German-speaking Switzerland

Wenger Vieli Ltd acts for a variety of clients,  from the banking and finance as well as life sciences sectors. From the offices in Zug and Zurich the practitioners cover advice on banking, capital markets, corporate and tax matters as well as dispute resolution. Roman Heiz specialises in real estate matters and Michael Mráz has a focus on white collar crime proceedings. Beat Speck, Michael Tschudin, Pascal Honold and Barbara Brauchli Rohrer are key contacts for capital markets, competition law, M&A and taxes respectively.

Switzerland > Regulatory, compliance and investigations

The team at Wenger Vieli Ltd is regularly instructed by financial institutions and multinational companies, as well as their boards of directors and senior executives to advise on a wide range of white-collar crime, compliance, and regulatory enforcement matters. It has experience in handling cases in connection with FINMA and the Swiss Department of Finance. Michael Mráz is representing clients in criminal and regulatory proceedings and leads the practice together with counsel Daniel Weber who is noted for ‘going the extra mile to support and advise his clients in the best way possible.’ Counsel Martin Peyer joined from Bär & Karrer Ltd. in October 2020.