As an expert in information security in process control and automation systems, PhD Physicist Dr. Stephan Beirer advises in particular medium-sized and large industrial companies and power supply companies, trade associations and manufacturers. He understands that attackers will keep developing new methods. Cyber security is a topic that affects the whole of society, and in the interview, Beirer explains what is important particularly in relation to power grids, what kind of attacks are most likely and what grid operators can do to prepare themselves.