Job Offer: F5 Security Specialist

Start Date: November 1, 2025
End Date: December 31, 2025 (with possibility of extension)

Work Location: Brussels & Remote

Required Languages: French and/or Dutch + English

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Role Description:

• Ensure compliance with security policies.

• Regularly assess the technical condition of IT systems.

• Respond effectively in crisis situations (organized attacks, network intrusions, virus detection, etc.).

• Develop response scenarios for such situations.

• Advise on technical solutions to secure connections with external partners, the intranet, and the internet.

• Detect security vulnerabilities in Windows, Linux, iOS, and Android environments and provide technical countermeasures.

• Conduct IT risk analyses for management.

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Education and Experience:

• Degree in Computer Science or Electronics.

• At least 5 years of experience in a similar position.

• 5 years of daily experience managing Palo Alto Firewalls (mandatory).

• Knowledge of Panorama (desired).

• 5 years of experience with VPN and Web Proxy solutions (mandatory).

• 10 years of experience with BIG-IP F5 (mandatory).

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Specific Knowledge:

• Proficient in TCP/IP, HTTP, HTTPS, SSL, and SNMP.

• Knowledge of routers, stateful packet inspection firewalls, and application firewalls, especially Palo Alto.

• Expertise in BIG-IP F5, APM + ASM (+AWAF) + LTM (minimum).

• Knowledge of Identity Providers, SSL VPN, and GTM.

• Familiarity with endpoint protection products and VPN solutions.

• Proficiency in antivirus protection systems and content inspection engines.

• Experience using monitoring and log correlation tools such as Splunk, Nessus, and ELK.

• Knowledge of operating systems including Microsoft Windows Azure, Server, Enterprise Linux Server (preferably RedHat Enterprise Linux), and Microsoft Windows workstations.

• Experience securing local wireless networks (WiFi, WEP, WPA, WPA2).

• Understanding of encryption principles and algorithms (Public Key, Private Key, RSA, DES, 3DES, AES, etc.).

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Required Qualities:

• Excellent written and verbal communication skills.

• Autonomous and proactive.

• Ability to adapt quickly to change.

• Team player.

• Methodical and detail-oriented.

• Skilled in writing reports and documentation.

• Creative, constructive, and solution-oriented.

• Customer-oriented mindset.

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Language Skills:

• Bilingual (French/Dutch) or good command of a second national language.

• Technical English essential.

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Practical Information:

• Work Schedule: Full-time, minimum 2 days/week on site, remote work permitted.

• Team: Multidisciplinary, a mix of internal and external collaborators.