Isabelle Kocher graduated from the École normale supérieure in Paris in 1987 and Mines ParisTech engineering school.

Between 1999 and 2002, she worked as industrial affairs advisor at the office of French prime minister Lionel Jospin.

She believes the sector must face a revolution in order to meet the challenge and move towards a world that is decarbonised, partly decentralised and digitalised [2] and where energy is available to all, including developing countries.

[9] To further encourage the focus of diversification at Engie, Kocher made a priority of increasing the diversity of its personnel teams.

[7][2] Kocher campaigned in 2018 to take on the chairman’s role when Mestrallet retired, but lost out after the government supported Jean-Pierre Clamadieu instead.

By the end of 2019, Kocher came under pressure amid reports of a strategy split within the group and disagreements between board members on whether to pursue a sell-off of some gas assets.