Senior Network Security Engineer & Firewall Lead

In4Matic; Brussel; On-site; EUR 95,000 - 125,000; Full time

Job summary

In4Matic is seeking a Senior Network Security Engineer to manage and evolve a multi-site security environment in Belgium. You will lead migrations from existing firewall platforms, design secure traffic flows, and harden infrastructure while ensuring operational continuity.

The role blends hands-on responsibilities with transformation projects, requiring strong English communication and autonomous execution. French/Dutch language skills are valued.

Qualifications

• Minimum 5 years of professional experience in network security.
• Fluent technical English; French/Dutch knowledge is a plus.
• Degree in Computer Science, IT or related field, or equivalent experience.
• Security certifications such as PCNSA or PCNSE add value.

Responsibilities

• Manage, configure and optimize Palo Alto Networks NGFW and Panorama environments.
• Lead firewall and security policy migrations, including analysis and validation.
• Contribute to network security architecture design focusing on segmentation and hardening.
• Participate in VPN, dynamic routing, and cross-site security projects.
• Develop and maintain technical documentation and security guidelines.
• Advise on secure connections with external partners and remediation of vulnerabilities.

Skills

Network security

Troubleshooting

English fluency

Independent work

Documentation

Education

CS/IT degree

PCNSA/PCNSE certs

Tools

Palo Alto NGFW

Panorama

App-ID

User-ID

Content-ID

URL Filtering

WildFire

GlobalProtect

F5 BIG-IP

Job description

In4Matic is seeking a Senior Network Security Engineer to manage and evolve a multi-site security environment in Belgium. You will lead migrations from existing firewall platforms, design secure traffic flows, and harden infrastructure while ensuring operational continuity.

The role blends hands-on responsibilities with transformation projects, requiring strong English communication and autonomous execution. French/Dutch language skills are valued.