Senior Network Security Engineer

Function

We’re looking for a Senior Network Security Engineer to join our client’s team and play a key role in managing, securing and continuously evolving a critical multi-site network security environment. The role combines hands-on operational responsibility with major transformation initiatives, including the controlled migration of firewall infrastructure from one technology platform to another. You will work in a technically demanding environment where reliability, security and operational continuity are essential.

Role & Responsibilities

• Manage, configure, administer and optimize Palo Alto Networks NGFW and Panorama environments.

• Lead and execute firewall and security policy migrations, including analysis, preparation, implementation and validation.

• Contribute to the design and evolution of network security architectures, with a focus on segmentation, hardening and secure traffic flows.

• Participate in projects involving network segmentation, infrastructure hardening, VPN connectivity and dynamic routing.

• Support interoperability with F5 BIG-IP and other network security technologies.

• Perform advanced troubleshooting and contribute to the resolution of critical incidents in a multi-site production environment.

• Participate in changes and deployments within critical production environments while maintaining operational continuity.

• Develop and maintain accurate technical documentation, operational procedures and security guidelines.

• Advise on technical solutions for securing connections with external partners through intranet and internet environments.

• Identify and implement appropriate measures to remediate vulnerabilities.

Technical Profile

The ideal candidate has solid hands-on experience with network security technologies, particularly:

• Palo Alto Networks NGFW and Panorama, including App-ID, User-ID, Content-ID, URL Filtering, WildFire and GlobalProtect.

• Firewall migration projects, including analysis of existing rules, objects, NAT and VPN configurations and the preparation of migration matrices.

• Forcepoint/Stonesoft environments and the migration of existing firewall policies towards Palo Alto Networks.

• F5 BIG-IP, particularly LTM, with knowledge of ASM/AWAF, load balancing and reverse proxy technologies considered an advantage.

• Network security fundamentals including TCP/IP, VLANs, VPN technologies and dynamic routing protocols such as BGP and OSPF.

• Network segmentation, infrastructure hardening and secure traffic-flow architectures.

• Microsoft Azure environments, proxy/WAF solutions and SOC/SecOps environments are considered additional assets.

Experience & Profile

• Minimum 5 years of professional experience in network security, with a clearly senior and autonomous profile.

• Strong troubleshooting skills and the ability to operate effectively during critical incidents.

• Comfortable combining day-to-day operational responsibilities with strategic network security transformation projects.

• Able to work independently under general direction while taking ownership of complex technical assignments.

• Strong written and verbal communication skills, with the ability to document technical work accurately and collaborate with network, security, systems, operations and project teams.

• Fluent technical English is required. Knowledge of French and Dutch is highly valued, with bilingual proficiency considered an advantage.

• Degree in Computer Science, IT or a related discipline, or equivalent professional experience.

• Certifications such as PCNSA or PCNSE are an advantage; F5 or additional security certifications are also considered a plus.

Contactperson & Reference

• Reference #: INW28268
• Marilyn Weytens
• marilyn.weytens@i4m.be