Sébastien Léger is a Partner in McKinsey’s Paris Office. Since joining the firm in 2000 in London, where he has spent his first three years with McKinsey, Sebastien has focused on strategy, sustainability and the energy industry. He also leads our global Service Line on the long-term evolution of power markets.

Sébastien serves clients along the energy value chain : power equipment manufacturers, oil and gas companies, utilities, energy intensive industries, financial investors and governments. In addition to clean tech, he is also very passionate by the water and waste industry and the circular economy.

Prior to joining McKinsey, Sebastien worked for three years with Diagma as a consultant in Logistics and Supply Chain Management. Sebastien also worked two years for L’Oreal in Indonesia.Sebastien holds an MBA from INSEAD and a degree in Engineering from Ecole Centrale de Paris with a specialisation in manufacturing and production management.
Sébastien lives near Paris with his wife and three children. He enjoys gardening and running in the forest.