Firm Profile > Alerion > Paris, France

75007 PARIS

Construction Tier 1

Alerion  advises leading French and international contractors on public and private sector construction projects. The firm also advises project sponsors.  The practice handles strategic construction projects in the nuclear and aerospace sectors, as well as public infrastructure building projects. The team is also notable for advising on renovation contracts and the construction of privately owned buildings, including advising on litigation issues. Philippe Mathurin, Gérald Lagier and Nathalie Dupuy-Loup are the key team members.


‘The team is always available and provides great quality work. Clients can blindly trust their analysis’.

Key clients




Société Générale


Insurance Tier 3



The quality of the service provided is always the same.’

The files monitored by the firm are always dealt with on time, regardless of the time allowed: very great reactivity, without losing the quality.’

Employment Tier 4


Practice head(s):

Tax Tier 5


Alerion is an independent law firm created in 2003, specialising in international business.  Constantly growing, it now has 18 partners and a total of over seventy lawyers. Based in Paris, the firm works both for French clients who are expanding internationally and foreign clients investing in France, advising them and assisting them in disputes. Over time, the firm has developed skills in the main areas covered by business law. The firm’s partners advise clients operating in most sectors of French and international economic life. Over the years, they have also developed specific and cross-disciplinary knowledge of certain areas of activity such as sports, pharmaceuticals & biotechnology, the digital economy, real-estate, and aerospace. The firm works for a wide variety of clients (large French and international groups, French subsidiaries of large international groups, listed companies or small and medium-sized businesses, start-ups, investment funds, associations, public institutions, local authorities, family offices, etc.). To fulfil its client’s foreign law requirements, Alerion has correspondents in most countries.

Department Name Email Telephone
Photo Name Position Profile
Mr Jacques Bouyssou  photo Mr Jacques Bouyssou Partner, Head of Litigation, arbitration and white-collar crime department and the Spanish…
Mr Pierre-Olivier Brouard  photo Mr Pierre-Olivier Brouard Partner, head of Corporate law department
Mr Jean-Christophe Brun  photo Mr Jean-Christophe Brun Partner
Mr Stanislas Curien  photo Mr Stanislas Curien Partner
Ms Nathalie Dupuy-Loup  photo Ms Nathalie Dupuy-Loup Partner
Mr Christophe Gerschel  photo Mr Christophe Gerschel Partner
Ms Nicola Kömpf  photo Ms Nicola Kömpf Partner
 Gérald Lagier photo Gérald Lagier Partner
Ms Sibylle Mareau  photo Ms Sibylle Mareau Partner
Mr Philippe Mathurin  photo Mr Philippe Mathurin Partner, head of department
Mr Jacques Perotto  photo Mr Jacques Perotto Partner
Mr Philippe Pescayre  photo Mr Philippe Pescayre Managing Partner
Mr Vincent Poirier  photo Mr Vincent Poirier Partner
Ms Catherine Robin  photo Ms Catherine Robin Partner
Mr Antoine Rousseau  photo Mr Antoine Rousseau Partner
Mr Frédéric Saffroy  photo Mr Frédéric Saffroy Partner
Ms Corinne Thiérache  photo Ms Corinne Thiérache Partner, Head of department
Mr Stanislas Vailhen  photo Mr Stanislas Vailhen Partner
IBA (International Bar Association)