Network Administrator

Quality and Reliability (QnR) is a leading Technology Group, with more than 30 years of presence in the market, delivering mission-critical digital transformation across Greece, Europe, and the broader EMEA region. QnR is an Athens Stock Exchange-listed technology Group currently undergoing a period of significant growth and transformation, having completed five acquisitions within the last 18 months.

Role overview

We are looking for a Network Administrator to join one of our EU public sector clients based in Brussels. You'll ensure operations of the network, including telecommunication and/or computer infrastructure to meet the organisation’s communication needs.

Requirements

The ideal candidate will be responsible for:

• Operate, maintain and support enterprise network infrastructure components.
• Investigate, diagnose, and resolve network incidents and performance issues to ensure service continuity.
• Ensure communication performance, resilience, and security requirements are aligned with agreed service level standards.
• Utilize network management and monitoring tools to analyze network load and evaluate performance metrics.
• Proactively monitor network traffic to identify and mitigate bottlenecks and optimize overall performance.
• Install, configure, and upgrade network components and network monitoring solutions.
• Perform testing and validation activities following infrastructure upgrades and changes.
• Contribute to the continuous improvement of network availability, reliability, and security.

To excel in this role, you'll need:

• Bachelor's degree in Computer Science, Engineering or a related technical field.
• Strong hands-on expertise with Palo Alto and F5 technologies.
• Solid experience with Cisco networking solutions.
• Good understanding of networking concepts and communication protocols, including WAN, LAN/WLAN and VLAN.
• Knowledge of network security principles, VPN technologies, and cryptographic communication techniques.
• Experience operating and managing network devices and services, including routers, switches, load balancers, accelerators, firewalls and cryptographic communication devices.
• Familiarity with network monitoring and performance management tools.
• Strong troubleshooting and analytical skills, with the ability to identify and resolve complex network issues.

Certifications you'll need:

At least 1 certification from the following:

• CCDP/CCNP, CCNA, CCDE/CCIE, CCAr or relevant certifications of F5, Juniper, Palo Alto
• BIG-IP certified administrator
• BIG-IP LTM Specialist: Maintain and Troubleshoot
• BIG-IP LTM Specialist: Architect, Set up, Deploy
• SANS certification related to Network Security