We are looking for a Contract/Freelance Windows System Administrator to join our client at The European Aviation Safety Authority (EASA) in Cologne, Germany. 12 Month contract offering both onsite and offsite work: €500 per day onsite and €300 per day offsite Your duties will include the following: Capabilities to develop and follow structured approaches for incident detection, response, and resolution Plan for future expansion requirements in collaboration with Service Manager and Data and IT architect Collaborate with IT assurance and performance officer to analyze and sustain capacity and performance requirements Administer COTS and corporate own developed software solutions Handle vendor escalations Perform, in close collaboration with the team, typical system administrative activities including daily performance monitoring, routine equipment checks and preventative maintenance, updating, controlling access permissions and privileges or issue troubleshooting and resolution Ensure compliance with standard practices, processes and enterprise standards Administer Microsoft servers and Microsoft management solution SCCM and SCOM Administer the image build process Administer our Active Directory and Azure Active directory Administer Microsoft security infrastructure. Do you think you are the person we are looking for? See below what experience or knowledge you should bring : Strong experience with OS management tool for windows (Microsoft System Center) in aspect such as OS deployment, software distribution, patch management, inventor and health check Experience with monitoring system (Microsoft System Center) Ability to support high availability environments Hands on experience with Microsoft Active directory and Azure Active Directory and the security aspect of them. Also best practices of security management with GPOs needs to be know Required IT skills: Good troubleshooting skills with different systems; being able to read log files and find potential errors Windows Servers Active Directory and Azure Active Directory Security Components Windows Defender (ATP) PKI Infrastructure