Mohamed Haj Taieb

Sophie Lafay is a top attorney recognized by Best Lawyers in the practice area(s) of Biotechnology and Life Sciences Practice. Sophie, who practices law in Paris, France, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sophie is held by other top lawyers in the same geographic and legal practice area.

Gaëlle Le Quillec is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration and Mediation and International Arbitration. Gaëlle, who practices law in Paris, France, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gaëlle is held by other top lawyers in the same geographic and legal practice area.

Florence Bilger is partner in the Tax department of our Paris office. She focuses her practice on the tax aspects of investments, restructurings, and mergers and acquisitions. Florence has experience representing French and international clients in their inbound investments and restructuring transactions. She also advises French clients in the tax aspects of mergers and acquisitions, including structuring transactions, conducting due diligence, and handling post-acquisition advice and litigat...

Hélène Gelas advises on public law, environmental law, urban planning law and energy law, in the field of energy and real estate. She holds a doctorate in law and assists her clients, from large listed groups and investment funds to small and medium-sized French and international companies, with advice and litigation before the administrative courts and in all stages of projects, whether for major real estate development projects or for renewable energy projects (wind, photovolt...

Aymar De Mauléon is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Reorganization Law. Aymar, who practices law in Paris, France, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Aymar is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/harroch-ariel/ .

Anthony Paronneau is a top attorney recognized by Best Lawyers in the practice area(s) of Biotechnology and Life Sciences Practice and Mergers and Acquisitions Law. Anthony, who practices law in Paris, France, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Anthony is held by other top lawyers in the same geographic and legal practice area.

Before joining UGGC Avocats, Alison Leroy worked for 7 years at Carakters, then at Franklin from 2020, and recently at Bersay, where she opened the “Life Sciences, Biotech and Pharma R&D” department. Her experience covers regulatory affairs, site and production unit management, and the negotiation and management of R&D and business development contracts (collaborative research contracts, co-development contracts, clinical trial contracts, French and European consortia, etc...

Xavier Leroux is a top attorney recognized by Best Lawyers in the practice area(s) of Venture Capital Law. Xavier, who practices law in Paris, France, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Xavier is held by other top lawyers in the same geographic and legal practice area.

Arnaud David is a top attorney recognized by Best Lawyers in the practice area(s) of Investment Funds and Private Equity Law. Arnaud, who practices law in Paris, France, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Arnaud is held by other top lawyers in the same geographic and legal practice area.