Senior Network Specialist

Location: Schaerbeek Belgium (Hybrid)
Start Date: 1 August 2026
Contract End: 31 January 2027
Application Closing Date: 3 July 2026

About the Role

We are seeking an experienced Senior Network Specialist to join the IT Operations team of a public sector organisation responsible for maintaining and evolving a large-scale enterprise IT infrastructure.

In this role you will be responsible for the administration maintenance design and implementation of critical network infrastructure supporting business-critical services. The position focuses heavily on Cisco ACI Datacenter Palo Alto Next-Generation Firewalls and enterprise networking technologies while contributing to ongoing infrastructure modernization security improvements and datacenter initiatives.

Key Responsibilities

• Manage and maintain enterprise network infrastructure and related systems.
• Configure administer and optimize Cisco ACI datacenter environments.
• Deploy maintain and secure Palo Alto Next-Generation Firewalls.
• Plan implement and monitor network changes and infrastructure upgrades.
• Support datacenter migration and infrastructure-modernization projects.
• Design and improve application-centric network security policies.
• Develop test and maintain disaster recovery and business continuity solutions.
• Troubleshoot complex networking issues and manage vendor support cases.
• Collaborate with infrastructure teams to ensure secure stable and high-performing network services.
• Participate in day-to-day operational support monitoring incident resolution and continuous improvement initiatives.

Required Skills & Experience

• Minimum 5 years experience as a network specialist.
• At least 5 years hands-on experience with Cisco Catalyst (IOS) and Cisco Nexus (NX-OS) switches including routing switching and network security.
• Minimum 3 years experience with Cisco ACI Datacenter technologies including configuration maintenance policy development and firewall integration.
• Minimum 3 years experience with Palo Alto Next-Generation Firewalls.
• Experience managing support cases with hardware manufacturers and maintenance providers.
• Strong background in enterprise network infrastructure and system configuration.
• Native-level Dutch proficiency (CEFR C2).

Preferred Experience

• LAN and WAN networking protocols.
• Routing and Switching.
• Enterprise Network Security.
• F5 BIG-IP Load Balancer / Application Delivery Controller.
• Linux system administration.
• Bash Perl or Python scripting.
• Server technologies including Apache JBoss WildFly Oracle Database and PostgreSQL.
• Storage technologies including NetApp FAS HPE Alletra HPE StoreOnce and Fibre Channel SAN environments.

Ideal Candidate

You are a proactive infrastructure professional with excellent troubleshooting and analytical skills. You thrive in complex enterprise environments can work independently while collaborating effectively with multidisciplinary teams and are committed to delivering secure reliable and scalable network solutions.

Working Arrangement

• Hybrid working model.
• Full-time assignment (100%).
• Estimated workload of 960 hours.
• Opportunity to work on enterprise-scale networking datacenter technologies and infrastructure transformation projects within a highly technical IT operations environment.