2nd and 3rd level support (not help desk), Ensuring stable operation of the IT infrastructure (servers, network, databases, cloud/on-premise environments, M365), Support in 2nd and 3rd level support for more complex incidents, Analysis and sustainable resolution of disruptions, Documentation and standardization of recurring solutions, Development and maintenance of a recovery plan, Implementation of technical and organizational security measures, Implementation and support of security tools (e.g., SIEM, EDR, vulnerability scans), Operation and further development of security components (e.g., firewall, endpoint security, M365 security), Analysis of security incidents and derivation of measures, Close cooperation with ISMS / Governance (but not leading), Contribution to the further development of the IT infrastructure, Implementation of changes and smaller projects, Support for standardization and automation, Cooperation with external service providers (incl. 3rd level support)