Guillaume exerce en matière de contrats internationaux, d’arbitrage et de contentieux international.

Guillaume has acted in more than seventy arbitration proceedings under various Arbitration Rules & Laws (ICC, ICSID, Swiss Rules, PCA, NAI, Court of Arbitration for Sport, etc.) and in matters including transnational sales contracts, post-acquisition disputes, construction projects, aviation and energy.

He also advises clients on international contracts, with a focus on international sales and art law.

Guillaume is an Avocat à la Cour registered to practice in Paris and Geneva. He holds a postgraduate degree in international law from the University Paris II (2001), a DEJA in English & American law (1999), and an LL.M. from the University of Essex (2000).

Il a exercé au sein des groupes arbitrages de cabinets internationaux à Paris et Genève et il est ancien Conseiller juridique à la Cour permanente d’arbitrage de La Haye.

Il travaille en français et anglais.

Guillaume Tattevin stands out as a very committed and very thorough practitioner. He will find time to find the best solution for his clients.

He is a dedicated professional - parties that choose to work with him can be assured they have made an excellent choice

Domaines d'activité

  • Arbitrage international
  • Contentieux international
  • Contrats internationaux

Projets récents

  • Representing a European company in a Swiss law arbitration relating to an Oil & Gas dispute in the Gulf region
  • Representing a North African IT company in an ICC arbitration in relation to a joint-venture project
  • Leading Swiss recovery of assets following a USD multi-billion fraud involving cross-jurisdiction recovery
  • Acting for a German company in enforcement of foreign arbitral awards and recovery of assets in Switzerland
  • Arbitrator in a dispute under the Sales Convention relating to the Middle East operations of several EMEA-based companies
  • Advising a Shanghai-based company in a sales-related cross border dispute
  • Advising a European chemical company in negotiations of long term supply agreements under Swiss law, including take or pay, revision triggers, FM/fundamental change of circumstances
  • Legal expert on Swiss law of contracts in a USD 800 million case before the English High Court

Publications & Conferences

  • Arbitration & ADR in Art-related Disputes, (Speaker, The Hague, 2019)
  • The New ICC Notes to Parties on the Conduct of the Arbitration (Speaker, Geneva, 2019)
  • A Matter of Balance: Confidentiality of Settlement Discussions vs. Effective Dispute Resolution (Juriste UIA, 2017-2)
  • Les systèmes ad-hoc de financement de l’arbitrage, JDI (Clunet) 2017-1
  • Advocacy in International Commercial Arbitration (Elliott Geisinger, Guillaume Tattevin (eds), ASA Special Series, Londres, 2013)
  • International legal practice in Switzerland (Geneva, 2018)
  • Price revision arbitration under LCIA & Swiss Rules (Geneva, 2017)
  • Iura novit curia (Florence, October 2016)
  • Third Party Funding & Enforcement (Geneva, 2015)
  • International sanctions in Cuba after the Embargo (Paris, 2015)
  • L’extension des clauses d’arbitrages dans les groupes de sociétés (Santo Domingo, 2015)

Affiliations professionnelles

  • International Bar Association
  • Ordre des avocats de Genève
  • Association suisse d’arbitrage (ASA)
  • Fondation suisse pour le droit de l’art
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