Jacques Sivignon


Jacques Sivignon


Paris | 32 rue de Monceau, Paris, France 75008
+33 1 57 57 81 24 | +33 1 57 57 80 81


Mr. Sivignon's principal activity is acting for multinational clients in complex commercial litigation, product liability, industrial risk and post-acquisition matters with a particular focus on pharmaceutical and healthcare industries. Mr. Sivignon also represents funds, investment advisers and related entities in investors’ litigation, securities and other financial disputes. His practice includes advising clients on compliance issues and working on a number of investigations dealing with corruption, fraud and violations of securities regulation.

Mr. Sivignon also acts as counsel for various state entities and multinational clients in ICC arbitrations concerning general corporate, license, construction and energy-related disputes. His practice includes the setting aside or enforcement of international arbitration awards, including attachment and tracing of assets.

In 2018, Mr. Sivignon was recognized by The Legal 500 EMEA for his litigation practice in France and being a "very determined, smart and curious" litigator.

Prior to joining Dechert, Mr. Sivignon was a member of the International Litigation/Arbitration Department in the Paris office of another international law firm. He has also worked in the firm's Brussels and Sydney offices.

  • The subsidiary of a Fortune 500 pharmaceutical company with an internal investigation examining the relationship of its French subsidiary with health care professionals and compliance with French regulations on corporate hospitality and gifts.
  • A Fortune 500 medical device manufacturer in a large anti-corruption internal investigation into the company’s discount and sales practices which the French anti-fraud authority considered breached French law. Potential FCPA violations were also investigated.
  • A leading pharmaceutical company in a US$500 million dispute arising out of the termination of a co-development agreement for a new product. 
  • An Asian manufacturer of electric components in a product liability dispute and worldwide product recall case. 
  • A US fund seeking to enforce an English decision against foreign governments’ instrumentalities in France.
  • A French engineering group in an ICC arbitration relating to claims for commissions by a purported agent in the procurent of large infrastructor project in the EUA.
  • A European construction group in an ad hoc arbitration and in proceedings to set aside the favorable award obtained before French Courts.
  • A French multinational retail group in a strategic corporate litigation with partners in the Middle East.

Includes matters handled at Dechert or prior to joining the firm.

  • New York University School of Law, LL.M., 1996
  • University of Paris Nanterre - Paris X, Maîtrise de Droit des Affaires, 1995, with Honors
  • Paris
  • New York
  • French
  • English
  • Greek
Speaking Engagements
  • Life Sciences Academy — Paris, France (October 2, 2018) 
  • Transparence et confidentialité : les défis de l'arbitrage  — Les rencontres de l'Arbitrage et du Contentieux, Paris (February 4, 2016)
  • Le contentieux au coeur de la stratégie de l'entreprise — Les rencontres de l'Arbitrage et du Contentieux, Paris (February 4, 2016)
  • Entreprises européennes: le défi américain de la Compliance — Organised by Université Panthéon-Assas and l'Ecole de Droit et de Management de Paris, Université Panthéon-Assas, Paris (June 5, 2015)
  • Les Rencontres de l'Arbitrage et du Contentieux -Contentieux multijuridictionnels — Organised by Option Finance, Paris (January 29, 2015)