Gauthier assists a clientele composed of French and foreign companies on all their tax issues and in the management of their international mobility policy (mobility schemes (expatriation, impatriation), calculation of remuneration packages, determination of the fiscal residence of managers and employees and the resulting obligations).

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He also assists individuals (in particular managers, liberal professionals and high-level athletes) in the structuring, optimization and transmission of their movable and real estate assets as well as in the determination and compliance with their reporting obligations (income tax, real estate wealth tax, exit-tax, etc.).

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Gauthier has also developed expertise in aspects related to employee shareholding and management packages (free shares, stock options, warrants for shares created by entrepreneurs, share subscription warrants, etc.).

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Finally, he regularly assists companies and individuals during tax audits or disputes.

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Before joining Squair, Gauthier worked for leading law firms (EY Société d'Avocats, Deloitte Société d'Avocats, Mazars Société d'Avocats) and in international companies (Auchan, Immochan).