lic iur Olivier Sigg > Walder Wyss Ltd. > Geneva, Switzerland > Lawyer Profile

Walder Wyss Ltd.
1211 GENEVA 3

Work Department

Private Clients, Tax, Litigation, Employment




Olivier Sigg is a partner in the Private Clients team as well as an experienced employment lawyer. He heads our Geneva office. He is known, both in Geneva and in London, where he worked for one year, as an expert in complex crossborder matters and is regularly instructed by foreign lawyers, in particular from common law jurisdictions.

Olivier Sigg’s private client practice includes various estate-planning techniques. In particular, as a TEP expert, he specialises in trusts, foundations, last wills and testaments. He provides advice to international high-net-worth individuals on estate planning, asset protection, relocation and philanthropy (in particular, advice to international charities). His private client practice involves international succession litigation and trust disputes. Olivier Sigg also has a wealth of experience in employment law. He advises both employers and executives in contractual and contentious matters.

rior to joining Walder Wyss, he worked in Geneva and London as an associate in another major Swiss law firm of which he became a partner in 2015. His work experience also includes a secondment in the International Private Wealth Group of a prominent London law firm.

In 2012, Olivier Sigg was appointed as a conciliatory judge with the Geneva Labour Court, and prior to that worked as a clerk with the same court for eight years. Earlier in his career, he worked at the Geneva Court of Appeal.



Olivier Sigg speaks French, Italian, English and Spanish and has a good command of German.


He is a member of the Swiss Bar Association, the Geneva Bar Association, the International Bar Association (IBA), the International Association of Lawyers (UIA) and the Society of Trust and Estate Practitioners (STEP) as well as a committee member and the Student Liaison Officer of STEP Geneva.


Olivier Sigg studied at the Universities of Geneva and Berne. He graduated in 2002 and was admitted to the Bar in 2005.

Lawyer Rankings

Switzerland > Private client

(Next Generation Partners)

Olivier SiggWalder Wyss Ltd.

The private client team at Walder Wyss Ltd. acts for an ‘impressive roster of clients‘ with a focus on acting for entrepreneurs from all types of business sectors as well as their families. The team advises on all personal and business aspects of clients, which includes international succession planning, including marital property law, setting up charitable foundations as well as funds and trusts, and, working in close conjunction with the labour law and real estate teams, the unit advises clients on the relocation to Switzerland and the acquisition of real estate assets. The practice is headed by ‘first classKinga Weiss and ‘outstandingPhilippe Pulfer and includes the ‘very dedicatedRobert Desax, ‘technically excellent‘ tax expert Fouad Sayegh and ‘highly talented’ international trust specialist Olivier Sigg.

Switzerland > Leading firms: French-speaking Switzerland

The Geneva and Lausanne offices of Walder Wyss Ltd. are well known for their capabilities in private client matters, litigation and white-collar crime proceedings as well as banking and finance, regulatory, real estate and tax issues. Private client specialist Olivier Sigg heads the Geneva office while the Lausanne office is headed by IT and data protection expert Jürg Schneider. Philippe Pulfer, Alexandre Both, Rodolphe Gautier, Hubertus Hillerström, Patrick Vogel and Fouad Sayegh are other key contacts.