The energy transition is a process of transformation in which digitalisation will play an essential role in supporting secure, economic and environmentally sustainable energy supply. How do climate protection, energy efficiency, security of supply, transparency and cost savings go together? An essential building block for the fulfilment of these goals is the development of smart electricity and gas grids and the roll-out of smart metering systems. Buzzwords like prosumer, smart meter gateway or 450 MHz are not foreign words to us, but part of our daily work. As energy and telecommunications experts, we group our competences and knowledge for public institutions, regulatory authorities and grid operators, to support the success of the energy transition.