After earning a Masters in Business Law (Paris II Assas, Class of 1988), Marc Bornhauser joined the Direct Tax Department of Bureau Francis Lefebvre in 1988 as a trainee Conseil Juridique.
He became an Avocat following the merger of the professions of Avocat and Conseil Juridique in 1992 and left Bureau Francis Lefebvre in 1995 to join the firm of Siméon et Associés before founding his own firm in 1997.
Marc is Honorary President and an Executive Member of the Institute of Tax Advisory Lawyers (Institut des Avocats Conseils Fiscaux - IACF), which he chaired from 2017 to 2020, after chairing its Technical Committee on the Taxation of Private Wealth. He is also a member of the International Academy of Estate and Trust Law.
He is a member of the National Bars Council (Conseil National des Barreaux) (term of office 2021–2023) where he was elected on the ACE list (Avocats Conseils d’Entreprise).
He is the author of various articles, in particular concerning capital gains on the disposal of securities, and has taught for 12 years on the Master II course in Business and Taxation Law at Paris II. He is a frequent lecturer at the IACF.
Marc holds a specialisation in Tax Law.
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