Portrait ofPierre-Sébastien Thill

Pierre-Sébastien Thill

Chairman of the Executive Board - Chairman of the Executive Committee CMS

CMS Francis Lefebvre Avocats
2 rue Ancelle
92522 Neuilly-sur-Seine
Languages English, German, French

Pierre-Sébastien Thill is an expert in international taxation. He has been Chairman of the Supervisory Board of CMS Francis Lefebvre since July 2016. He was the managing partner of CMS Francis Lefebvre's New York office from 1994 to 1997. He was a member of the firm's Management Board from 2000 to 2004 and served as Chairman of the Management Board from 2004 to 2012. He was also Chairman of the CMS Executive Committee from 2003 to 2008 and a member of the Executive Committee from 2008 to 2012.

Pierre-Sébastien has specialised in international taxation for 28 years, acting as an international tax partner in the firm. He co-managed the International Taxation Department comprising 15 partners and 30 associates. He regularly provides advice to international groups, focusing particularly on issues relating to M&A transactions, corporate reorganisations and the structuring of investment funds.

more less

Best Lawyer, Tax Law

Best Lawyers 2024

Relevant experience

  • Chairman of Management Board (2004-2012)
  • Member of Management Board (2000-2004)
  • Member of CMS Executive Committee (2008-2012)
  • Chairman of CMS Executive Committee (2003-2008)
  • Managing partner, with Carina Levintoff, of CMS Francis Lefebvre Avocats's New York office (March 1994 to July 1997)
more less

Memberships & Roles

  • Member of the Commission pour la Libération de la Croissance Française (Commission on Growth), chaired by Jacques Attali (2007)
  • Member of IACF (French Institute of Tax Lawyers)
  • Member of ACE (French Association of Corporate Legal Advisors)
  • Member of IFA (International Fiscal Association)
  • Member of IBA (International Bar Association)
  • Member of the Institut de l'Entreprise (Enterprise Institute) Advisory Council
more less


  • Post-graduate degree (DESS) in Corporate Law, post-graduate degree (DJCE) in Corporate Legal Advice, University of Aix-Marseille (1983)
more less


40th Anniversary European General Counsel Forum
CMS proudly supporting European Company Lawyers Association (ECLA).
Alongside one of the world’s foremost business summits, DIE ZEIT and CMS were hosting an exclusive reception on 22 January 2020 at the Steigenberger Grandhotel Belvédère Davos. Key players took part...
CMS expands in Africa
Frankfurt, 7 October 2019. CMS announces that RM Partners and Daly & Inamdar Advocates, based in South Africa and Kenya respectively, have today joined the leading global law firm. Going forward, they...