Wenger Vieli Ltd

Internal and Regulatory Investigations

Michael Mráz

Michael Mráz defends individuals and companies in criminal and investigative proceedings. He also advises companies on investigating and preventing criminal or disciplinary violations. In civil and arbitration proceedings, Michael Mráz represents parties in the enforcement or defense of claims. “Criminal trials and disputes in court are often burdensome for the parties involved. Keeping a clear head in such situations and working towards a successful solution is the challenge that I appreciate most about my job.”

Martin Peyer

Martin Peyer’s practice focuses on banking, insurance, and financial market law. He supports clients regarding complex regulatory and compliance matters and represents them in licensing and enforcement proceedings. He also has extensive experience in M&A transactions and independent internal investigations in the financial sector, as well as in financing. “I like to spend my free time in the mountains. Whether snowboarding in the winter or hiking in the summer, I always find a way to bring balance to my work as a lawyer.”

Bignia Vieli

With many years of experience, Bignia Vieli has acquired extensive expertise in the field of financial market law. She predominantly advises and represents banks and financial service providers in supervisory and civil law matters. Bignia Vieli also works in the field of capital market law, as well as corporate and trade law. Another focus of her work involves advising and representing private clients in all aspects of estate planning and inheritance law. “Even after many years of legal practice, the breadth and variety of this profession still fills me with enthusiasm. I love having personal contact with my clients, and I always look forward to the challenge – even in difficult situations – of finding solutions for them that are persuasive, durable, and move things forward.”

Loris Baumgartner

As an attorney, Loris Baumgartner represents and advises individuals and companies in proceedings before judicial and regulatory authorities. As a criminal defence lawyer, he focuses in particular on representing clients in front of criminal prosecution authorities. In addition, Loris Baumgartner regularly advises clients on the preparation, implementation and evaluation of internal and regulatory investigations. Loris Baumgartner is currently writing a doctoral thesis in the area of bribery of private individuals. “I became a lawyer out of pure idealism, with the fervent hope of being able to do my part to create a better and fairer world. In the end, I became a criminal defense lawyer – and could not have realized my dream in a better way.”

Una Paunovic

Una Paunovic represents and advises individuals and corporations in proceedings before courts and regulatory authorities. As a criminal defense lawyer, she particularly specializes in representing clients in front of criminal prosecution authorities. Furthermore, she regularly counsels clients on the preparation, implementation, and analysis of internal and regulatory investigations. “As a lawyer, I consider it my foremost duty to listen and comprehend how I can assist effectively. To me, this encompasses attentiveness, trust, and empathy.“

Peter Hafner

Peter Hafner specializes in civil and commercial litigation. His work focuses on representing companies from the finance and trade sectors in proceedings before state courts and arbitration tribunals, as well as advising and safeguarding the employer's interests in contentious disputes between companies and their employees. Peter Hafner is ranked among the leading litigation lawyers in Switzerland by Chambers, The Legal 500, and Who's Who Legal. "The effective representation of a party in contentious cases requires good communication, knowledge of the facts of the case, prudent litigation management, and strong negotiation skills. Therefore, the role of a litigator is extremely diverse and exciting."

Team Services

Recently, there has been an increase in internal and regulatory investigations into potential misconduct. We guide companies and individuals through the legal and practical challenges such investigations present. At the same time, we advise companies and individuals on all whistleblowing matters.

Our expertise in the area of internal and regulatory investigations includes:

- Internal and regulatory investigations in the financial services and pharmaceutical sectors, under anti-trust law and with regard to anti-corruption compliance
- Clarification as to potentially criminal acts and compliance violations
- Advising and representing individuals and companies in investigations conducted by Swiss and foreign regulatory and criminal authorities
- Advice and representation in proceedings concerning the transmission of information to foreign authorities including mutual assistance
- Advice on the implementation of a customized internal corporate investigation framework and related training
Our expertise in the area of whistleblowing includes:

- Conducting independent whistleblowing investigations
- Advising and representing individuals and companies in whistleblowing matters
- Advice on the implementation of a customized whistleblowing framework and related training