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 is Counsel in our Private Clients team. Olivier’s main expertise is in trusts, foundations and other estate-planning techniques. In addition to his private client practice, he is an experienced employment lawyer. Olivier is experienced in advising international high-net-worth individuals on estate planning, asset protection, relocation and philanthropy. He acts for a wide range of private clients, including entrepreneurs and high-profile international families. His private client practice includes complex cross-border succession litigation and trust disputes. Olivier also has a wealth of experience in employment law. He advises both employers and executives on contractual matters, and litigates in this field.


Prior to joining Walder Wyss, Olivier worked in Geneva and London in another major Swiss law firm of which he became a partner in 2015. His work experience also includes a secondment to the International Private Wealth Group of a prominent London law firm. In 2012, Olivier was appointed as a Conciliatory Judge with the Geneva Labour Court. Earlier in his career, he worked at the Geneva Court of Appeal.


Olivier speaks French, Italian, English and Spanish.


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


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

Lawyer Rankings

Switzerland > Private client

(Next Generation Partners)

Olivier SiggWalder Wyss Ltd.

Walder Wyss Ltd. has a strong track record in advising Swiss and foreign entrepreneurs from a variety of industries. The firm is noted for fielding the ‘complete set of skills, languages and experts‘ and the team is active in succession planning, including matrimonial, inheritance, corporate and tax law, and related disputes. Through collaboration with the labour and real estate teams, it also often advises on relocations. Kinga Weiss has more than 20 years of experience acting as an adviser to private clients, banks and family offices. She and tax specialist Stephan Neidhardt head up the Zurich practice, and Philippe Pulfer leads in Geneva. Olivier Sigg combines his private client practice with employment law. Robert Desax and Geneva-based Fouad Sayegh are other names to note.

Switzerland > Leading firms: French-speaking Switzerland

The members of Walder Wyss Ltd.‘s French-Swiss offices are well versed in corporate, banking and finance, regulatory, litigation and white-collar criminal law as well as real estate, tax and private client matters. The Lausanne offering also includes experience in IP/IT, where managing partner Jürg Schneider is a key contact. Managing partner of the Geneva office, Philippe Pulfer, regularly acts for high-net-worth individuals, trust companies and charities. Alexandre Both handles M&A and PE transactions. Rodolphe GautierHubertus HillerströmOlivier SiggPatrick Vogel and Fouad Sayegh are also noted.