Ms. Hartmann was Deputy CEO and Chief Financial Officer of ENGIE, an international energy services company, from 2015 to 2022. Prior to joining ENGIE, she served as Chief Financial Officer and member of the Executive Board of international media and services corporation Bertelsmann from 2012 to 2015, and held a number of financial and operational roles at General Electric in the US, Latin America and Europe from 2000 to 2012. She currently serves on the Board of Directors of Unilever and has previously served on the boards of Suez, RTL Group, Penguin Random House and Gruner + Jahr.