Ariel Ben Hattar

Jamar E. Brown joins the Dispute Resolution and Private Clients groups in the Geneva office. In the dispute resolution field, Jamar represents international organisations in employment disputes before specialised administrative tribunals, including the Administrative Tribunal of the International Labour Organization. He is also a trusted advisor on internal investigations, disciplinary matters, and appeals before internal review bodies. In his private client work, Jamar specialises in regulat...

Fouad Sayegh is a partner in the tax team. His expertise covers most aspects of domestic and international taxation. He regularly advises high net worth families in their relocation, wealth reorganization, asset protection, estate planning and charitable projects, which often includes tax advice in relation to trusts, private foundations and investment vehicles. In the field of corporate tax, his practice includes advising on M&A transactions, corporate reorganizations, double tax treaty ...

Hubertus Hillerström is a partner in the Banking & Finance Team. He is specialised in national and international financings and mergers & acquisitions, including structured finance as well as private equity and venture capital transactions. He has accompanied numerous commodities and trade finance operations (oil and gas, metals and soft commodities) and follows closely the legislative changes in this field. Hubertus Hillerström also specialises in real estate transactions a...

Julien Witzig is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Julien, who practices law in Geneva, Switzerland, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Julien is held by other top lawyers in the same geographic and legal practice area.

Expert in corporate tax law, international tax planning, mergers and acquisitions, as well as strategy and transfer pricing. Also acts as counsel in domestic and international tax criminal proceedings. Seats on the Board of directors of several companies. He has extensive experience in banking tax law, as well as in taxation of investment structures (investment funds and corporate holdings) and commodity trading companies.

Christophe Buchwalder is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law, Corporate Law and Mergers and Acquisitions Law. Christophe, who practices law in Geneva, Switzerland, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christophe is held by other top lawyers in the same geographic and legal practice area.

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,...

Andrio Orler is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Andrio, who practices law in Geneva, Switzerland, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andrio is held by other top lawyers in the same geographic and legal practice area.

Adriano Antonietti advises domestic and foreign banking and financial institutions, as well as collective investment schemes and asset managers on a wide range of matters, in particular regulatory issues, private placements, the drafting of banking contracts and certain tax related matters (FATCA, CRS). He also defends banks and their clients in a number of disputes and deals with all aspects of corporate and commercial law. His main fields include financial products and services, including r...

Partner Pierre Ducret is a partner and co-head of the Private Clients and Sports Law departments of CMS von Erlach Partners. He advises and assists clients in complex litigation, mainly in civil and commercial matters, usually with international ramifications. He is particularly active in the field of inheritance law. He also acts as counsel or arbitrator in international arbitration proceedings. In addition to his dispute resolution practice, Pierre Ducret advises his clients on wealth and e...