Ra-in Mariella Orelli > Homburger > Zurich, Switzerland > Lawyer Profile

Mariella Orelli photo

Work Department

Litigation | Arbitration.


Partner. Domestic and international commercial litigation and arbitration. Primary focus on representing parties in energy related matters, corporate matters and matters relating to mergers and acquisitions (including joint ventures), insurance, crossborder sales, long-term supply contracts, construction projects and pharma.


Qualified in 1996. Partner at Homburger since 2007. Law clerk with the Commercial Court of the Canton of Zurich. Foreign associate at Herbert Smith.


German, Italian, English, French.


Zurich and Swiss Bar Associations, IBA, ASA, LCIA.


University of Zurich (lic iur), College of Europe of Bruges (LLM).

Lawyer Rankings

Switzerland > Public law

The public law practice at Homburger has experience in regulated sectors, including the energy, IT, healthcare and pharmaceutical industries, and also handles work for various blue-chip clients. Highlights included representing Siemens in a Swiss merger control procedure; acting for Alpiq in a dispute with Romanian suppliers relating to electricity provision; and representing Implenia in public procurement proceedings. Other clients include Airbus, Booking.com and Nestlé. Competition law expert Marcel Dietrich and international disputes specialist Mariella Orelli lead the team; Richard Stäuber made partner in January 2020.

Switzerland > Dispute resolution: arbitration

Homburger‘s arbitration practice impresses with its wide range of activity, being involved in disputes related to contracts, transactions, data protection and employment, among others. It is regularly instructed by national and international blue-chip clients in particular from regulated industries. Team head Balz Gross is a dedicated arbitration counsel in M&A, contracts, and joint venture proceedings. Felix Dasser has a good track record in commercial and investment disputes. Gabrielle Nater-Bass acts as counsel as well as arbitrator, and is also recommended alongside Mariella Orelli and senior associate Stefanie Pfisterer.