Our law firm

Stefan Wehrenberg

Stefan Wehrenberg

Attorney at Law

+41 (0)44 213 63 63


Stefan Wehrenberg is a criminal defense lawyer and representative of damaged parties’ interests in white collar crime proceedings. He also has many years of experience in international criminal law, the representation in foreign criminal proceedings as well as in international legal assistance and in extradition law. His profound expertise and vast experience includes the areas of compliance, anti-money laundering legislation, financial market supervisory laws including the related sanction law.
In addition, Stefan Wehrenberg advises and represents clients regularly in public procurement cases, construction and planning law and environmental law. One focal point of his activity is health law where he has gained wide-ranging practical experience not only because of his long-term presidency of the Om-budsman’s office of the University Hospital Zurich but also due to many other mandates.
He is also author and editor of numerous publications.


  • Since 2017: Partner with Umbricht Attorneys
  • 2008-2017: Partner with Blum & Grob Attorneys, Zurich
  • 2005-2008: Partner with Blum Attorneys, Zurich
  • 2003-2004: Associate with von Meiss Blum & Partner, Zurich
  • 2002-2003: Legal Advisor and Trial Attorney with the Office of the Prosecutor of the Special Court for Sierra Leone, Freetown, Sierra Leone
  • 1998-2002: Associate with Umbricht Attorneys, Zurich
  • 2000: Admission to the Bar, Canton Zurich
  • 1995-1997: Legal Advisor with the Public Health Department of the Canton of Zurich
  • 1992-1994: Academic Assistant to Prof. Dr. Alfred Kölz, University of Zurich
  • 1991: lic. iur. (University of Zurich)

Preferred Areas of Work

Criminal Law and White Collar Crime, International Criminal Law and Legal Assistance, Compliance and Financial Market Supervisory Law, Administrative Law/Procedural Law, Health Law, Public Procurement Law, Construction and Planning Law, Environmental Law, Constitutional Law, Human Rights


  • Colonel in the Swiss Military Justice, for many years Head Legal; since 2017 Judge at the Military Supreme Court
  • President of the Ombudsman’s office of the University Hospital Zurich (2003 - 2019)
  • Chairman of the Board of Examiners for dental prothesis makers (since 2003)
  • Member of the Zurich and Swiss Bar Association (ZAV, SAV)
  • Member of the Zurich and Swiss Jurists’ Associations (ZJV, SJCV)
  • Swiss Criminoloy Association (SKG)
  • Forum for Criminal Defense (FStrV)
  • Wirtschaftsstrafrechtliche Vereinigung e.V., Ländergruppe Schweiz (WisteV)
  • International Criminal Law Association (ICLN)
  • International Society for Military Law and the Law of War (IGMK)
  • International Law Association, Swiss Chapter (ILA)
  • Society for Environmental Law (Vereinigung für Umweltrecht - VUR)


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German, English