Yoan established in Hanoi in 2011 the Vietnamese branch of Elithis, a French consultant in Energy Efficiency. In 2014, he joined Boydens Engineering as Head of Energy Consulting, and then moved to HCMC in 2016 to open a new office as Business Development Director, covering the whole South-East Asia. After a 3-year challenge from 2020 at Reecons Engineering to re-build the commercial strategy and raising the company up to a position of MEP leader in the Industrial Construction Sector, Yoan joined GreenYellow as Chief Commercial Officer in July 2023 and is now in charge of the solar energy expansion through Vietnam, and the development of Energy Efficiency – as GreenYellow aims at beeing a pioneer investor & partner in the Industrial Sector.