Okwind appoints Olivier Dattin as Chief Administrative and Financial Officer
Groupe OKWIND has entrusted the administrative and financial management to Olivier Dattin, who succeeds Gilles Bidermann. The company achieved consolidated revenue of €23.8 million in 2025.
A financial profile with over 30 years of experience
Groupe OKWIND, specializing in energy generation and management systems dedicated to self-consumption, has announced the appointment of Olivier Dattin to the position of Chief Administrative and Financial Officer.
A graduate of ESSCA and the Nantes Academy (Diplomas of Higher Accounting and Financial Studies), Olivier Dattin has over 30 years of experience in finance, including more than 10 years in change management.
After starting his career in audit, notably at EY, he held positions as Chief Administrative and Financial Officer in sectors such as industry, service provision and healthcare social services.
The departure of Gilles Bidermann welcomed by senior management
Marie-Sylvie Bertail, Chief Executive Officer of Groupe OKWIND, thanked Gilles Bidermann, who supported the group over the past three years, wishing him success in his future endeavors.
Founded in 2009 by Louis Maurice, Chairman of the Board of Directors, the group is based in Torcé, 30 km from Rennes. As of June 30, 2026, the company had 127 employees and more than 5,500 installations across French territory.
