Senior Network Security Engineer

Freelancer Opportunity!!

Job Title: Sr. Network Security Engineer

Job location: Brussels, Belgium

Job duration: 2026-01-01 to 2026-12-31

Job weekly hours: 40 hrs./week

Fluent in English, with conversational ability in French or Dutch preferred

Based in Belgium, hybrid working 3 days/week at the office.

Job Description:

As a Network Security Engineer, you are responsible for the implementation, monitoring, and continuous improvement to meet the organization's NIS2 requirements. You focus on both proactive and reactive security measures to protect PMH’s digital and media infrastructure to meet the demands of PMH’s ambitions: Live, broadcasting, playout, content management, media operations, and more.

You will work across traditional IT systems and specialized media and broadcast networks. Collaboration with innovation teams, project management, technology teams, and external vendors is a daily aspect of the role.

You proactively propose, develop, and maintain future-proof security solutions that align with PMH’s strategic goals while ensuring operational effectiveness and business continuity.

Your Role:

Design and implement secure network, system, and application architectures aligned with industry best practices.

Perform continuous vulnerability management and patch management.

Define and enforce firewall, network, endpoint, and cloud security policies.

Collaborate with the internal Proximus CSIRT to enhance detections.

Evaluate and test security tools and recommend enhancements.

Collaborate with project and infrastructure teams to embed security requirements in design and deployment phases.

Assist in creating and reviewing operational documentation for NIS2 compliance.

Maintain compliance with relevant security standards (e.g., ISO27001, NIS2, GDPR).

Support internal and external audits, including documentation and remediation tracking.

Develop and deliver internal security training and awareness initiatives.

Participate in change and incident management processes to ensure secure implementations.

You are occasionally available to handle critical security tasks or incidents outside of standard business hours (estimated 2–3 times per year).

Your Profile:

3–10 years of experience in cybersecurity roles (Medior: 3+, Senior: 7+)

Certified in one or more: CISSP, CISM, OSCP, CEH, CCSP, or equivalent is a plus

Solid understanding of firewalls, IDS/IPS, SIEM, DLP, endpoint protection, and encryption technologies

Experience securing hybrid infrastructures (on-prem, cloud, media-specific systems)

Knowledge of broadcast media environments and video-over-IP is a strong asset

Demonstrated skills in incident detection, analysis, and response

Experience with Cisco, Checkpoint and Fortinet Firewall, Arista security-enabled networking products is a strong plus

Familiarity with automation/scripting for security (Python, Bash, PowerShell)

Team player with the ability to work independently

Strong problem-solving and communication skills

Apply now and start your journey with Team Possible! We want to get to know you.

After your application, we will verify your profile and get back to you within 3

working days.

If you’re successful, you can expect the following steps:

An initial conversation with our recruiter - Swati Kumari

Interview with the Hiring Manager and the team.

Final decision

About Proximus

We are Team Possible turning tech into opportunities.

We are driven by four core pillars: "I care," "I make a difference," "I radically simplify," and "I embrace the future". This means you'll join a team that genuinely cares for customers and colleagues, is empowered to make a real impact, strives to radically simplify complex challenges, and is always looking ahead to embrace the future of technology. We believe in an inclusive and safe environment where everyone can thrive, offering extensive career development resources, including access to over 5,000 training modules and a minimum of 5 days of training per year, to help you continuously learn, grow, and tackle bold challenges with us.