Senior System Administrator – Internal IT (m/w/d)

Help us accelerate scientific collaboration. The web was created to help scientists collaborate and share knowledge. Today, we're carrying that mission forward by building technology that makes research more connected, more efficient, and more impactful. Behind every great product is a great internal IT organization. To keep our teams productive, secure, and focused on what matters most, we rely on a modern, high-performing IT environment. We're looking for an experienced, hands-on IT professional with strong technical expertise, a pragmatic approach, and a passion for continuously improving infrastructure, automation, and the employee experience. The Role As our Senior System Administrator , you will play a key role in operating, maintaining, and continuously improving our internal IT environment. This is a full-time, on-site role based in our Berlin office at Chausseestraße, where you'll provide hands-on support, manage our workplace infrastructure, and ensure our systems remain secure, scalable, and reliable.  This is a role for someone who enjoys thinking strategically while remaining deeply involved in day-to-day operations. From end-user support and endpoint management to networking, infrastructure, automation, and security, you'll have the opportunity to make a meaningful impact across our entire IT landscape. You'll be the go-to technical contact for internal IT, help establish and improve processes, drive continuous improvements, and step in wherever your expertise is needed. What You’ll Do Operativer Betrieb und kontinuierliche Weiterentwicklung unserer internen IT-Infrastruktur und Services Operate, maintain, and continuously improve our internal IT infrastructure and services Provide high-quality IT support to employees (hardware, software, account administration, access management, and workplace support) Manage Windows and macOS endpoints, from provisioning and configuration to ongoing maintenance Administer user accounts, permissions, and identity and access management (IAM) Maintain and further develop our network infrastructure Troubleshoot and resolve hardware, software, and infrastructure issues Automate recurring administrative tasks and operational workflows Strengthen our security posture by implementing and improving technical security controls and best practices Coordinate with external vendors, service providers, and technology partners Evaluate, introduce, and leverage modern technologies, including AI-powered tools that improve automation, operational efficiency, and employee productivity What We're Looking For Several years of hands-on experience in systems administration, internal IT, or IT infrastructure Strong expertise in administering both Windows and macOS environments Solid understanding of networking fundamentals (e.g. DNS, TCP/IP, HTTP) and IT security best practices  Experience with Identity and Access Management (IAM) Experience with endpoint management and end-user IT support Interest in modern AI-