Olivier started his career at Arthur Andersen in 2001 and joined Deloitte in 2002, and is a partner of our M&A tax practice.
He specializes in the structuring of acquisitions and post-deal reorganizations, in due diligences on both the buyer and seller side, and more generally in all tax aspects of transaction services. He advises both PE houses and strategic buyers.
He has in particular developed a strong expertise in tax modelling and preparation of complex funds flows, as well as in managing international projects with the support of the professionals of the Deloitte's tax network.

Christophe Demarche is currently responsible for a team of 33 at Crédit Lyonnais in Paris, managing LBO and structured finance operations for small-cap clients. His previous roles include Senior Banker in Strasbourg, overseeing a portfolio of 20 clients across various sectors, and Director of a Business Center in Lille, where he supported SMEs with financing operations and risk management.

Thierry joined Amundi as Head of European Bank Loans in June 2017, and led the launch of three institutional funds and of one ELTIF fund, and he expanded the investor base from one French client to more than 30 European investors. He was promoted to the position of Managing Director European Bank Loans in July 2021 when relocating in Paris. Thierry is member of the ESG Committee of ELFA, the European Leveraged Finance Association. Prior to joining Amundi, Thierry de Vergnes headed the debt fund management activity of Lyxor Asset Management UK LLP that he had founded under the name of Egret Management LLP and managed for Société Générale.
Before that, he was co-head of Indosuez Capital, the New York Merchant Banking and Asset Management subsidiary of Crédit Agricole Indosuez, where he raised and managed two Private Equity funds managed a fund of Private Equity funds.
Thierry began his career in Paris at Indosuez in the credit department before exercising functions in the Corporate Finance department in Paris and then in London.
Thierry is a Civil Engineer graduate from Mines and holds an Economist Engineer degree from the Institut Français du Pétrole and is registered with the Financial Control Authority in the UK.