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Armelle Sandrin-Deforge's practice focuses on French, European, and international environmental law, including energy, health and safety, and regulatory issues. Her experience covers climate change and sustainable development, industrial facilities, contaminated sites, waste and circular economy, renewable energy, marine and coastal environmental issues, and asbestos. She advises on regulatory and litigation matters.

Armelle has extensive experience in environmental issues related to M&A, particularly in environmental audits, environmental representation, and warranties. She also provides services to French and international clients with respect to ESG (environmental, social, and governance) reporting pursuant to French and European regulations such as duty of vigilance, taxonomy, CSRD (Corporate Sustainability Reporting Directive), and deforestation as well as in connection with capital markets transactions.

Armelle is particularly involved in the life science and pharmaceutical industries and is part of the Firm's multidisciplinary team that works to anticipate and respond to the new challenges facing this sector. She has represented major manufacturers, distributors, and users of medical devices, products, and services in transactional, regulatory, enforcement, and litigation matters in the life science area.

Armelle is the author of numerous publications on environmental and energy law. She teaches a renewable energy course at the University of Paris V-René Descartes and participates in environmental law and life science conferences. She is a member of the France Fulbright Alumni Association.


  • State-owned company involved in post M&A arbitration proceedings relating to environmental reps and warrantiesJones Day has successfully represented a French state-owned company in an arbitration that was commenced by another company in ICC arbitration proceedings arising out of claims concerning certain environmental guarantees and indemnities that were granted under a Contribution Agreement concluded with respect to a joint venture.
  • Orano and XTC New Energy create two JVs dedicated to the production of batteries for electric vehiclesJones Day is advising Orano in the context of the setting-up of two joint-ventures dedicated to the production of critical materials for batteries for electric vehicles, together with Chinese group XTC New Energy.
  • Électricité de Strasbourg forms JV with ErametJones Day advised Électricité de Strasbourg, an energy provider in Alsace (France), in the formation of a joint venture with Eramet, one of the leading French actors in the mining and metallurgy industries, to develop and use joint capabilities for the extraction, refining and production of lithium from geothermal resources, with a targeted annual volume of 10,000 tons of lithium corresponding to the volume necessary to produce c.250,000 batteries for electric vehicles per year).
  • Creadev and Temasek invest in InnovafeedJones Day advised Creadev SAS and Temasek, investors in the $250 million Series D financing of Innovafeed, a leader in the production of insects (Hermetia Illucens) for animal and plant nutrition.
  • Bryan Garnier & Co Limited, Natixis, and Portzamparc complete up to €124 million IPO of Lhyfe on EuronextJones Day represented Bryan Garnier & Co Limited, Natixis, and Portzamparc (BNP Paribas Group), as joint lead managers and joint bookrunners, in connection with the up to €124 million initial public offering of Lhyfe on the regulated market of Euronext in Paris.
  • Simpson Manufacturing Company announces offer to acquire Etanco GroupJones Day advised Simpson Manufacturing Company, Inc. in the €725 million acquisition of the Etanco Group.
  • Sweep raises $73 million in Series B financing roundJones Day advised Sweep, the leading carbon management platform for large enterprises, in connection with its $73 million Series B round of financing led by Coatue.
  • Framatome acquires Rolls-Royce Civil Nuclear Instrumentation and Control business in France and ChinaJones Day advised Framatome, an international leader in nuclear energy recognized for its innovative solutions and value added technologies for the global nuclear fleet, in its acquisition of the Rolls-Royce Civil Nuclear Instrumentation and Control business in France and China.
  • Forsee Power completes €115 million offering and IPO on regulated market of Euronext in ParisJones Day advised Forsee Power in connection with its initial public offering on the regulated market of Euronext in Paris and an offering of up to €115 million.
  • Waga Energy completes €110 million IPO on Euronext in Paris, with green shoe optionJones Day advised Waga Energy, a French company specialized in the recovery of landfill gas as biomethane, in connection with its €110 million initial public offering of Ordinary Shares on the regulated market of Euronext in Paris with an over-allotment option up to €123 million.
  • Deutsche Pfandbriefbank and Société Générale complete €159 million project financing for modernization of Ariane waste treatment plant in NiceJones Day advised Deutsche Pfandbriefbank AG (pbb) and Société Générale in connection with the €159 million project financing of the modernization of the Ariane waste treatment plant operated by Veolia in Nice for Métropole Nice Côte d'Azur under a Build-Operate-Transfer (BOT) concession scheme.
  • Framatome acquires ValinoxJones Day advised Framatome SAS in the acquisition of 100% of the shares of Valinox Nucléaire SAS, a French company specializing in the production of seamless tubes for nuclear use, from the Vallourec group.
  • SUEZ sells its SUEZ Recycling & Recovery operations to PreZeroJones Day advised the French listed company SUEZ SA in its largest sale of SUEZ Recycling & Recovery operations - excluding plastic recycling and hazardous waste treatment activities - in four continental Europe countries: the Netherlands, Luxembourg, Germany, and Poland to PreZero, the environmental division of Schwarz Group.
  • Reno De Medici sells 100% interest in R.D.M. La Rochette S.A.S.Jones Day advised Reno De Medici SpA in the sale of its 100% interest in R.D.M. La Rochette S.A.S. to La Rochette Holding S.A.S., 100% owned by Mutares SE & Co. KgaA.
  • HealthHero acquires QareJones Day advised HealthHero in its acquisition of Qare, a French platform that provides medical video consultation services, backed by Kamet Ventures.
  • Solvay sold Process Materials business to Composites OneJones Day advised Solvay S.A., a publicly listed chemical company based in Brussels, Belgium, in the sale of its Process Materials business, to Composites One, the leading North American supplier of composites materials and value added services.
  • TotalEnergies reorganizes and refinances two portfolios of solar assets in New Caledonia, France and sells 50% of two portfolios to institutional investorJones Day represented TotalEnergies Renewables France (f.k.a. Total Quadran), as sponsor, in connection with the corporate reorganization and refinancing of two portfolios of solar assets in New Caledonia, France; and legal counsel to Total Quadran on the sale of 50% of the two portfolios to an institutional investor.
  • DataBank acquires zColo for $1.4 billionJones Day advised DataBank, a leading provider of enterprise-class colocation, connectivity, and managed services, in connection with the acquisition and financing of zColo, including certain U.S. and European data center assets, from Zayo Group Holdings, Inc. for $1.4 billion.
  • French Gas Association appeals for annulment of energy regulationsJones Day represents the French Gas Association (AFG) before the Conseil d’État, the French administrative supreme court, in petitioning for the annulment of various provisions that determine technical factors of energy sources as outlined in the Multiannual Energy Programme (PPE) that was adopted in a Decree dated April 21, 2020.
  • Milliken & Company acquires Borchers from The Jordan CompanyJones Day advised Milliken & Company in its acquisition of Borchers Group Limited, a global specialty chemicals company known for its innovative high-performance coating additives and specialty catalyst solutions, from The Jordan Company, L.P.
    • July 3, 2023
      Cour de Cassation - Colloque « Reporting » extra-financier et plan de vigilance : quelle portée pour les engagements pris. Faut-il penser de nouveaux types d’actes pour les décliner ? »
    • May 16, 2023
      Fulbright France - Café scientifique #3 - « Discours et connaissances du changement climatique »
    • 12 avril 2018
      Finale de la 4ème édition du Prix Jones Day/Paris II/ESSEC
    • November 9, 2016
      Jones Day Global Life Sciences Conference – 2016 Issues & Trends