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About the Role

You want to shape IT infrastructure, not just manage it. If you think in systems, work structurally, and possess network expertise that makes a real difference, you're in the right place.

Responsibilities

• Operation, further development, and modernization of our IT infrastructure (Linux & Windows)
• Administration and further development of our network infrastructure (Firewalls, Routing, Switching, VPN)
• Administration of virtualization and storage systems (Proxmox, VMware/ESXi, Huawei/HPE, etc.)
• Support for diverse departmental applications and special solutions
• Planning and execution of maintenance work, patch management, and monitoring
• Analysis, automation, and documentation of processes and IT services
• Collaboration with other IT teams (DevOps, Helpdesk, Network), including occasional support for escalated support requests
• Participation in IT projects (e.g., VM modernization, PKI, KRITIS compliance)

Requirements

• Several years of experience as a System Engineer or Senior System Administrator
• In-depth knowledge of Linux server administration (Debian, CentOS, etc.)
• Solid Windows Server knowledge (AD, DNS, DHCP, Group Policies)
• Proven experience in network operations: Firewalls, Routing, Switching, VPN Gateways – you can read, debug, and structure a network effectively
• Experience with Proxmox and/or VMware/ESXi, as well as storage and backup systems
• Independent, structured way of working – even without complete documentation
• Enjoyment of automation (Ansible, Shell/Python, or similar) and knowledge transfer within the team
• Willingness to take responsibility and drive topics forward, not just process them

Skills

• Linux server administration
• Windows Server administration
• Network operations
• Firewalls
• Routing
• Switching
• VPN
• Proxmox
• VMware/ESXi
• Storage systems
• Backup systems
• Automation
• Ansible
• Shell scripting
• Python scripting
• Cloud computing (AWS)
• Infrastructure as Code (IaC)
• Microsoft 365
• Entra ID / Azure AD
• Security hardening
• MFA
• Role concepts
• SOC integration
• Docker
• Kubernetes
• Container orchestration
• PKI / Certificate Management
• MDM/MAM solutions
• KRITIS compliance
• TKG compliance
• ISO 27001

Location

• Hybrid

Work Type

• Full-time

Experience Level

• Senior
• System Engineer
• Senior System Administrator

Benefits

• Permanent employment contract
• 30 days of vacation
• High-quality technical equipment, also for private use
• Capital-forming benefits
• Company pension plan
• Flat hierarchies
• Short information channels
• Pleasant working atmosphere
• Familiar and open interaction in a 'du' culture
• Hybrid working with reasonable arrangements

About the Company

• Inspiring people with the speed of light – this is the vision that drives the approximately 250 employees of the DNS:NET family. We stand for the 'connection of the future' and have made it our mission to enforce the fundamental right to internet access in underserved regions.
• As a medium-sized telecommunications company, we have been a firm fixture in the IT industry since 1998. Our service portfolio reflects the entire value chain: from the construction to the operation of our own network infrastructure, the DNS:NET corporate group offers diverse fields of application for specialists, generalists, career changers, and trainees.