Quality & Reliability

End-to-end digital transformation and tech solutions

Network Administrator

Network Engineering & AdministrationConfirmed live in the last 24 hours

Full-timeBrussels, BelgiumNo salary listed

About the Job

Requirements

A bachelor's degree in Computer Science, Engineering, or a related technical field is required.
At least 7 years of experience is required.
Strong hands-on expertise with Palo Alto and F5 technologies is required.
Solid experience with Cisco networking solutions is required.
Good understanding of networking concepts and communication protocols, including WAN, LAN/WLAN, and VLAN, is required.
Knowledge of network security principles, VPN technologies, and cryptographic communication techniques is required.
Experience operating and managing network devices and services, including routers, switches, load balancers, accelerators, firewalls, and cryptographic communication devices, is required.
Familiarity with network monitoring and performance management tools is required.
Strong troubleshooting and analytical skills, with the ability to identify and resolve complex network issues, are required.
At least one certification is required from the listed options: CCDP/CCNP, CCNA, CCDE/CCIE, CCAr, relevant F5, Juniper, or Palo Alto certifications, BIG-IP Certified Administrator, BIG-IP LTM Specialist: Maintain and Troubleshoot, BIG-IP LTM Specialist: Architect, Set up, Deploy, or a SANS certification related to Network Security.

Responsibilities

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 align with agreed service-level standards.
Use 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.

Network Administrator

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

Workplace: hybrid

Department: EU Operations

Description

Are you a Network Administrator? Think bigger about your next move!

Build your future with QnR Group.
JOIN THE NEXT EUROPEAN TECHNOLOGY POWERHOUSE 🚀

Network Administrator | Quality & Reliability (QnR), the parent company of QnR Group

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.

About QnR Group

QnR Group is a technology group with 35 years of experience, 8 companies, 4 delivery centers and 210+ professionals across Greece, Belgium, Cyprus and Poland. Listed on the Athens Stock Exchange since 2000, we deliver mission-critical digital transformation projects for the public and private sector. The Group’s capabilities covers software engineering, enterprise and generative AI, cybersecurity, cloud infrastructure, SAP and ServiceNow solutions, core banking and maritime intelligence.

Requirements

What you'll work on:

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

What you bring:

Bachelor's degree in Computer Science, Engineering or a related technical field
At least 7 years of experience
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 required:

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)

About the Company

Quality & Reliability

End-to-end digital transformation and tech solutions

Quality & Reliability (QnR) Group is a European technology group delivering mission-critical digital transformation and advanced technology solutions across Greece, Europe and the broader EMEA region. It combines eight specialized companies into an integrated ecosystem to provide end-to-end solutions by coordinating AI, cybersecurity, cloud, ERP, IoT, asset management, maritime and defence tech for governments, financial institutions and other enterprises. It differentiates itself through strategic acquisitions, cross-company collaboration, and a focus on regulated industries that require multi-disciplinary delivery beyond single-vendor offerings. Its goal is to become a leading European technology powerhouse by acquiring, integrating, innovating and scaling to deliver lasting value, resilience and competitive advantage for clients across Europe, the Middle East and Africa.

Company size: 51-200
Company stage: Not listed
Total funding: Not listed
Headquarters: Greece
Founded: 1992

Recently Posted Jobs

Explore more opportunities at Quality & Reliability

See more jobs