I was a developer and cybersecurity expert for a government-level institution. My responsibilities included various implementations in the area of IT and cybersecurity.
It started with integrating and implementing various technologies such as intrusion detection systems. That is, detecting attacks and tracking down malicious packages in the network in real-time, deducting them, and implementing countermeasures on a physical and routing protocol layer.
Basically, I worked on everything related to modern (government) technology from a security standpoint. These included threats in cyberspace, like attack scenarios and the attack surfaces which malicious actors might exploit.