
Linux/Windows System Administrator
sino AG
Düsseldorf, NR, Germany • 21m ago • Hybrid
Senior
Hybrid
45,000 - 75,000 EUR/yr
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Quick Facts
Role: Linux/Windows System Administrator (m/w/d)
Description
You will administer and optimize Linux and Windows servers, databases, SANs, virtualization, and Active Directory. You will manage network switches, monitor and troubleshoot IT systems, support users with technical issues, document the IT landscape, and help plan infrastructure (hardware and software). The role includes operational cybersecurity support and backup control to protect systems against cyber threats.
Responsibilities
Administer Linux and Windows servers
Operate and optimize databases, SANs, and virtualization
Manage Active Directory and Windows clients
Manage the network and switches
Support employees and customers with technical problems
Plan and install hardware purchases
Protect systems against cyberattacks and manage backups
Monitor IT systems and optimize issues
Document the IT landscape
Participate in strategic IT infrastructure planning (hardware/software) including business coordination
Requirements
At least 5 years of professional experience
Relevant completed training or degree
Very good Linux and Windows administration knowledge
Extensive experience with virtualization, backup, and network administration
Solid SQL database knowledge (MariaDB)
Experience administering Active Directory
Good German communication skills (spoken and written)
Independent working style
Interest in operational cybersecurity or information security
Benefits
Independent work with responsibility
Collegial team in a small company with flat hierarchies and short decision paths
High personal scope for participation and shaping decisions
Individual development and training opportunities
Height-adjustable workstation; fully equipped laptop
Excellent public transport connections and parking options
Casual dress code
No night shifts or on-call duty
Laptop, workstation, and multiple monitors
Free drinks, coffee, and fruit
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