Senior Sys & Network Admin — Mission-Critical IT, On-Site

ILIAS Solutions; Kleine-Brogel; Remote; EUR 55,000 - 75,000; Full time

Job summary

ILIAS Solutions operates and secures mission critical IT systems at Kleine-Brogel Air Base in collaboration with Belgian Defence. You will own system stability, network performance and operational continuity in a controlled environment where reliability drives every decision.

Full-time on-site presence is required, with responsibilities spanning Windows/Linux administration, network infrastructure, backup/DR, and incident troubleshooting to ensure uptime and security.

Qualifications

• 5+ years in system and network administration.
• Strong experience with Windows and Linux environments.
• Solid networking knowledge including TCP/IP, LAN/WAN and switching.
• Experience with enterprise networking environments (e.g. Cisco or Juniper).
• Hands-on experience with infrastructure components such as virtualization, storage and backup.
• Experience working in mission critical or highly controlled environments.
• Strong troubleshooting skills and structured way of working.
• Professional communication in English.

Responsibilities

• Manage and monitor Windows and Linux systems in a high availability environment.
• Maintain network infrastructure including routers, switches and firewalls (Layer 2/3, TCP/IP).
• Own backup, restore and disaster recovery processes across virtualization and storage environments.
• Control system configurations and changes within strict procedures.
• Troubleshoot complex issues across systems, networks and infrastructure.
• Support users and coordinate with on-site stakeholders.

Skills

Windows

Linux

Networking

Cisco/Juniper

Virtualization

Backup

Troubleshooting

English

Job description

ILIAS Solutions operates and secures mission critical IT systems at Kleine-Brogel Air Base in collaboration with Belgian Defence. You will own system stability, network performance and operational continuity in a controlled environment where reliability drives every decision.

Full-time on-site presence is required, with responsibilities spanning Windows/Linux administration, network infrastructure, backup/DR, and incident troubleshooting to ensure uptime and security.