Wyssam Mansour advises national and international companies and investment funds on their complex M&A, joint venture and private equity transactions, as well as their contractual structures.
He works mainly in the industrial, energy, natural resources and infrastructure sectors (energy, storage, digital infrastructure, mobility, etc.), in which he has significant experience.
Wyssam also puts his expertise to work for clients involved in new technologies and disruptive innovations, particularly deeptech.
Background
Lawyer since : 2012
Bar. : Paris
Language(s) : French - English
Training :
- LL.M. – International Business Law, London Kings College, 2010
- Master II- Business law and taxation, Université Panthéon-Assas (Paris II), 2009
- Magistère – Economic Activities Law, Université Panthéon-Sorbonne (Paris I), 2009
Member of :
- Association Internationale des Jeunes avocats (AIJA)
Publications
- Les nouvelles règles du jeu américaines – L’Usine Nouvelle, 07/11/2025
- “Infrastructures numériques et souveraineté : maitrise des dependances et infrastructures résilientes” – InfraVision 03/11/2025
- Faced with investment contraction, tech seeks alternatives – Forbes, 10/03/2022 – Quote from Stephen Walters
- Advised SunLib on its €25 million fundraising from Epopée Gestion
- Advised Solvéo Energies in its fundraising of nearly 100 million euros led by Mirova
- Advised Conquest on its investment in E-Totem (a major player in the market for electric vehicle recharging solutions) and E-Totem Infrastructure 2
- Advised Tikehau Capital in its acquisition of Visco, a recognized player in high-precision mechanical machining for leading-edge industries such as defense, aeronautics, space, arms and energy
- Support for Orano in the acquisition by Orano Nuclear Packages and Services (Orano NPS) of Daher’s nuclear activities in Germany and North America
- Support for Orano in the acquisition by Orano Nuclear Packages and Services (Orano NPS) from Geodis of Société de Transports Spéciaux Industriels (STSI), specialized in multimodal transport of sensitive materials, in particular rail and road transport of nuclear materials
- Advised Plenium Partners and SWEN Capital Partners in Smart Energies’ €87 million fund-raising to accelerate its development
- Advised the shareholder of Sicat, a manufacturer of beta silicon carbide and carbon catalyst supports, in connection with the acquisition of a 50.1% stake in its share capital by Saint-Gobain Norpro, a business unit of Saint-Gobain Ceramics
- Advised TSE, a French solar energy company, in its €130 million fundraising with Eurazeo, Bpifrance and a pool of investors from the Crédit Agricole Group
- Support for Orano in its acquisition of KSB Service Energie (KSE) and its subsidiaries KSB Service Cotumer (KSC) and Société de Travaux et d’Ingénierie Industrielle (STII) from the German KSB group, a global player in the manufacture of industrial pumps and valves
- Advised Acacia on the conclusion of its alliance with Eren to develop, finance, and operate more than 500MW
- Jeantet advises KEON on a €40 million bond financing arranged by SIENNA INVESTMENT MANAGERS
- Jeantet assists SOLVÉO ENERGIES in its fundraising of nearly 100 million euros led by MIROVA
Jeantet advises Q Energy on its investment in Pennavel, the project company developing the floating offshore wind farm off the south coast of Brittany
Paris, March 18, 2026 – Jeantet advised Q Energy on its equity investment in Pennavel, the project company developing the floating offshore wind farm off the south coast of Brittany. As a new shareholder, Q Energy strengthens the consortium composed of Elicio France and BayWa r.e. France, bringing complementary experience, technical expertise and human resources. […]
| CORPORATE – M&A – PRIVATE EQUITY | EMPLOYMENT
Jeantet assists Aerix Systems in its fundraising to deploy its omnidirectional aerial robot and launch its industrial pre-series
Paris, March 10, 2026 – Jeantet advised Aerix Systems in connection with the completion of a fundraising round aimed at accelerating the industrialization of its omnidirectional aerial robots, unprecedented and unique systems worldwide. The funding round was jointly led by Odyssée Venture, a long-standing private equity player and French specialist in growth companies, and another […]
| CORPORATE – M&A – PRIVATE EQUITY
Jeantet advises SunLib on its €25 million fundraising from Epopée Gestion to accelerate the development of solar subscriptions in France
Paris, January 15, 2026 – Jeantet advised SunLib in connection with the conclusion of a strategic partnership with Epopée Gestion to accelerate the deployment of turnkey photovoltaic installations to as many people as possible. SunLib offers a solar self-consumption solution available as a long-term subscription throughout France. Épopée Gestion is providing €25 million to support […]
| CORPORATE – M&A – PRIVATE EQUITY | TAX | EMPLOYMENT | INTELLECTUAL PROPERTY | ENERGY AND NATURAL RESOURCES LAW
Les nouvelles règles du jeu américaines – L’Usine Nouvelle, 07/11/2025
While the economic climate remains favorable in the United States, the administration is creating an unstable business environment. Companies must adapt. Read the full article here.
| CORPORATE – M&A – PRIVATE EQUITY
“Infrastructures numériques et souveraineté : maitrise des dependances et infrastructures résilientes” – InfraVision 03/11/2025
Digital infrastructure and sovereignty issues are now a key topic for public policy, businesses, and regions. However, public debate remains marked by conceptual confusion, which undermines the effectiveness of collective action. Read the full white paper here.
Jeantet assists Melvan in its €25 million fundraising to accelerate its development in France
Paris, June 26, 2025 – Jeantet assisted Melvan, a multi-technology renewable energy producer and developer, in opening its capital to a consortium of investors composed of Bpifrance, through its France Investissement Énergie Environnement 2 fund, IDIA Capital Investissement, through its Crédit Agricole Energie & Economie Bas Carbone I fund, and a pool of investors from […]
Paris | CORPORATE – M&A – PRIVATE EQUITY | PUBLIC LAW – PUBLIC CONTRACTS | ENERGY AND NATURAL RESOURCES LAW | BANKING AND FINANCE LAW | EMPLOYMENT
Jeantet advises ACACIA in the conclusion of its alliance with EREN to develop, finance and operate more than 500MW of stand-alone BESS (Battery Energy Storage System) in France
Paris, June 6, 2025 – Jeantet advised Acacia, developer of renewable energy and primarily BESS projects in France, in the conclusion of its alliance with Eren to develop, build and operate a portfolio of BESS projects in France of more than 500MW, with nearly 200MW soon to start construction and more than 300MW in advanced […]
Paris | CORPORATE – M&A – PRIVATE EQUITY
Jeantet advises KEON on a €40 million bond financing arranged by SIENNA INVESTMENT MANAGERS
Paris, June 2, 2025 – Jeantet advised KEON Group, a leading French player in the biogas sector, on a €40 million bond financing arranged by Sienna Investment Managers. This strategic transaction marks a new milestone in KEON’s development and consolidates its position as a leader in the green gas sector. KEON operates across the entire […]
Paris | BANK-FINANCE-REGULATORY
Jeantet assists SOLVÉO ENERGIES in its fundraising of nearly 100 million euros led by MIROVA
Paris, 27 May 2025 – Jeantet has advised Solvéo Energies, an independent French renewable energy producer, committed to energy transition and firmly established in local territories, in a strategic fundraising of 98 million euros. This operation is led by Mirova, which invests in equity alongside historical investors. Solvéo Energies, an independent French renewable energy producer, […]
Paris | CORPORATE – M&A – PRIVATE EQUITY
Jeantet advised PLENIUM PARTNERS and SWEN CAPITAL PARTNERS in the fundraising of €87 million of SMART ENERGIES to accelerate its development
Paris, 7 June, 2024 – Jeantet advised Plenium Partners’ and SWEN Capital Partners’ funds in their investment in Smart Energies, a French leading solar IPP, alongside the long-standing historical shareholders of Smart Energies, and RGREEN INVEST, which has supported the group since 2022. The capital increase amounts to €87 million and will accelerate the deployment […]
Paris | CORPORATE – M&A – PRIVATE EQUITY
Jeantet advises banking pool in connection with a new financing transaction for a portfolio of 331 photovoltaic power plants
Paris, April 3, 2024 – Jeantet assisted the banking pool, made up of BPIFrance, CIC and Unifergie, with a new project financing package developed by Tenergie. The transaction, valued at over one hundred million euros, involves the financing of a portfolio of 331 photovoltaic power plants located in France, installed on building roofs, on the […]
Paris | FINANCING
Jeantet assists the banking pool in connection with the financing of the Tenergie project
Paris, July 28, 2023 – Jeantet has advised the banking pool (CIC, BPCE Energéco and BPI France) in connection with the project financing transaction for Tenergie, a French developer and producer of renewable energies. The €78 million global financing transaction covers the funding of a varied portfolio of photovoltaic power plants: roofs on existing buildings, […]
Paris | BANK-FINANCE-REGULATORY