Claudia Töpfer is Group Lead Energy at O2 Telefónica in Munich. Together with her team, she ensures that the network infrastructure is supplied with green power every day. Additionally, she evaluates intelligent energy and CO2-saving opportunities based on modern technology solutions. Previously, she worked in the Transformation and Efficiency department at DFMG Deutsche Funkturm and as a project manager at E.ON. She is a member of the supervisory board of a community energy company. Claudia holds a university degree in energy engineering with a focus on renewable energies.