# Network Administrator

> Quality & Reliability S.A. (QnR) · Brussels, Belgium (Hybrid) · Full-time · Posted 2026-09-29

**Workplace:** hybrid

**Department:** TnM

## Description

**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

## Apply

[Apply at Quality & Reliability S.A. (QnR)](https://apply.workable.com/qnr-1/j/8317729698/apply)

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