Koen Sandbrink is a cybersecurity advisor for the National Cyber Security Centre of The Netherlands (NCSC-NL). Originally educated to make IT, he started his career as a security tester to break IT. In the following decade, he has seen too many things gone wrong and has developed a few opinions on how not to do those things anymore. Koen likes trains, architecture and classical music and is convinced that Ludwig van Beethoven was a hacker.