LAWYER PROFILE

Mariella Orelli

Europe 2026

Homburger

Ranked in 2 practice areas

Arbitration Counsel

Switzerland

6 years ranked

Arbitration (International)

Europe-wide

6 years ranked

About

Provided by Homburger

Practice Areas

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. Languages: German, Italian, English, French.

Career

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

Professional Memberships

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

Publications

Publications on topics relating to litigation in Switzerland, energy law and international arbitration in Switzerland.

Personal

Swiss citizen, born 1968. University of Zurich (lic. iur.), College of Europe of Bruges (LL.M.).

Chambers Review

Provided by Chambers

Chambers European Guide

Arbitration Counsel - Switzerland

Band 1

Individual Editorial

Mariella Orelli possesses particular expertise in arbitrations in a range of industries, including energy, insurance and financial services. She also represents clients in post-M&A arbitration proceedings and contractual disputes.

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Arbitration (International) - Europe-wide

Band 5

Individual Editorial

Mariella Orelli is a key figure in Homburger's international arbitration practice, handling commercial and investor-state cases inside and outside of Switzerland under various rules. She is visible in energy, post-M&A and telecommunications disputes.

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Strengths

Provided by Chambers

Mariella has a very good understanding of both arbitration principles and substantive Swiss law. She is very good and provides solid, correct advice.
Arbitration CounselChambers European Guide
Mariella Orelli is an excellent lawyer who helped me a lot.
Arbitration CounselChambers European Guide
Mariella Orelli has a lot of experience. She is precise and exactly what we need.
Arbitration CounselChambers European Guide
She was key in providing recommendations, leading the team to the right decision and then achieving the results.
Arbitration CounselChambers European Guide
Mariella has a very good understanding, both of arbitration principles and substantive Swiss law. She is very good and provides solid, correct advice.
Arbitration (International)Chambers European Guide