Marguerite Aynès

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Marguerite Aynès is admitted to the Paris Bar (2008) and the New York Bar (2009).

She assists companies and their managers in litigation before the civil and commercial courts, as well as in domestic and international arbitration. In particular, she is involved in complex business law litigation, for French and international companies, and in serial litigation and arbitration.

She represents major players in the industrial (pharmaceuticals, agribusiness, aviation, defence), finance, cryptofinance and insurance, telecommunications, construction, and sports sectors.

Before co-founding Grandjean Avocats with Thomas Lambard and Jean-Pierre Grandjean, she practiced for nearly ten years as an associate and then Counsel at Clifford Chance, this experience being preceded by two years in another international law firm.

Marguerite is a board member of Droit & Procédure (Law & Procedure Association), a member of the French Arbitration Committee of the ICC and the French Association for Arbitration (AFA), as well as the American Bar Association.

Marguerite Aynès teaches a course on product liability at Université Paris I – La Sorbonne, a course on litigation strategy at the Sciences Po Law School, and a course on “Arbitration and public policy” for the Master in Arbitration and International Business Law (MACI) of Université Paris-Saclay

Marguerite is a graduate of Columbia University in New York (LL.M., 2008), Université Paris II Panthéon-Assas (Postgraduate degree (DEA) in Private International Law, 2005; Master’s degree (Maîtrise) in Business Law, 2004) and the Institute of Comparative Law (University degree (DU) in Comparative Law, 2005)

" We were impressed with the quality of the work, professionalism and the practical advice.’ ‘Marguerite Aynes delivered very high-quality work within a very tight deadline, innovative and commercially aware lawyer’ ‘The quality of the writings and the pleadings of the firm is excellent. They command a lot of respect ", Legal 500