Network Security Engineer F5

Function

We’re looking for a Senior Network & Security Engineer to join our client’s team and take ownership of the security, administration and continuous evolution of critical network security infrastructure. This is a highly autonomous, hands-on role for an experienced security professional who can combine strong technical expertise with a structured approach to risk management, vulnerability remediation and incident response.

Role & Responsibilities

• Install, configure, administer and continuously improve F5 / Advanced Web Application Firewall (AWAF) infrastructure, including APM, ASM, LTM, Identity Provider and SSL VPN technologies.

• Develop, document and monitor the implementation of security policies and standards.

• Continuously assess the security posture of IT systems and identify potential threats, vulnerabilities and weaknesses.

• Conduct technical risk assessments across different IT environments and provide actionable recommendations.

• Implement remediation measures to address identified vulnerabilities and improve the overall security posture.

• Advise on secure technical solutions for internal and external partner connectivity, including intranet and internet connections.

• Contribute actively to security incident and crisis management, including coordinated attacks, network intrusions, malware/virus incidents and other critical security events.

• Produce clear and rigorous technical documentation, security assessments and incident/crisis reports.

Technical Profile

The ideal candidate has extensive experience in network and IT security, with strong expertise in:

• F5 / AWAF installation, configuration, administration and troubleshooting.

• Application and network security technologies, including APM, ASM, LTM, Identity Provider and SSL VPN.

• Network and application firewalls, particularly technologies such as Palo Alto, Forcepoint and Panorama.

• VPN and Web Proxy solutions.

• Network security protocols and technologies including TCP/IP, HTTP/HTTPS, SSL and SNMP.

• Security monitoring, log analysis and correlation tools such as Splunk, Nessus and Elastic SIEM.

• Wireless network security, including Wi-Fi, WEP, WPA/WPA2 and encryption principles.

• Remote-access and site-to-site VPN solutions, Web Proxy technologies and terminal-server environments such as Citrix.

Experience & Soft Skills

• 7+ years of relevant experience, with approximately 10 years or more in IT security strongly preferred.

• Proven ability to work independently under general direction and take ownership of complex technical security matters.

• Demonstrated experience handling security incidents and operating effectively under pressure during crisis situations.

• Strong analytical, risk-assessment and problem-solving capabilities.

• Excellent written and verbal communication skills, with the ability to produce high-quality technical documentation and communicate effectively with both technical teams and management.

• Team-oriented, methodical, precise and client-focused.

• English is essential for technical communication; knowledge of French and/or Dutch is highly valued, with bilingual proficiency in French and Dutch considered an advantage.

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

Contactperson & Reference

• Reference #: INW28269
• Pieter Messely
• pieter.messely@i4m.be