Mr Sebastiano Nessi, LL.M., FCIArb > Schellenberg Wittmer Ltd > Geneva, Switzerland > Lawyer Profile

Schellenberg Wittmer Ltd
15bis, rue des Alpes
P.O. Box 2088
1211 Geneva 1

Work Department

Dispute Resolution / International Arbitration


Sebastiano Nessi is a Counsel in our International Arbitration Group in Geneva. Trained in both civil and common law, Sebastiano has advised and represented clients in numerous arbitrations, both ad hoc and under each of the major institutional rules. Sebastiano also sits as an arbitrator.
Sebastiano is ranked as one of the 10 Most Highly Regarded lawyers (Future Leaders) in Europe Middle East, Africa (EMEA) by Who’s Who Legal Arbitration.


Counsel at Schellenberg Wittmer

Senior Associate at Schellenberg Wittmer

Senior Associate at Allen & Overy LLP, Paris

Associate in a major Swiss law firm in Geneva


  • French
  • English
  • German
  • Spanish


  • International Chamber of Commerce (ICC YAF) Representative for Europe and Russia
  • Vice-chair of the Chartered Institute of Arbitrators’ Young Members Group (CIArb YMG)
  • Lecturer on commercial and investment arbitration at the University of Paris I, Panthéon-Sorbonne and Sciences Po Law School
  • Guest Lecturer Swiss Arbitration Academy


2020 – Fellow of the Chartered Institute of Arbitrators (FCIArb)
2015 –
Certificate of Advanced Studies in arbitration, University of Lucerne and University of Neuchâtel

2012 – Arbitration Practitioner (ArbP) Diploma, Swiss Arbitration Academy

2009 – LL.M., Columbia Law School, New York

2006 – Bar Admission in Switzerland

2004 – Master of Law, University of Geneva

Lawyer Rankings

Switzerland > Dispute resolution: arbitration

Schellenberg Wittmer Ltd is noted for having an ‘outstanding team capable of handling very complex cases‘. Its caseload includes international commercial, investment and sports arbitration proceedings. The team has considerable expertise in a range of industries, including construction, infrastructure, energy, life sciences, commodities and hospitality. Elliott Geisinger in Geneva is the firm’s arbitration chair and is experienced in disputes arising from joint venture agreements, as well as sales and distribution contracts. Christopher Boog, whose ‘advocacy skills are unparalleled‘, divides his time between Zurich and Singapore. Other key names include Philippe Bärtsch , Anya George and Anna Kozmenko as well as counsels Anne-Carole Cremades and Sebastiano Nessi in Geneva. The team lost Nathalie Voser who left to set up dispute resolution boutique practice Rothorn Legal in November 2020.