Firewall Security Engineer – Enterprise Network Defense

FNB South Africa; Randburg; On-site; ZAR 600,000 - 900,000; Full time

Job summary

FNB South Africa is seeking an experienced Firewall Security Specialist to join the Infrastructure and Cybersecurity team. You will be responsible for admin, maintenance, monitoring, and optimization of enterprise firewall and network security platforms to safeguard banking systems.

The role demands strong knowledge of network security technologies, change management, threat mitigation, and operational support within a large-scale enterprise.

Qualifications

• Degree or diploma in IT, network engineering, or cyber security.
• 3–5+ years hands-on firewall administration.
• Experience with enterprise security platforms in a large environment.
• Experience handling security change requests and major incidents.
• Industry certifications such as CCNA/CCNP Security or Cisco Secure Firewall are advantageous.

Responsibilities

• Administer and support enterprise firewall environments.
• Implement security policies, ACLs, NAT, VPNs, and zones.
• Perform firewall upgrades and patching.
• Monitor firewall performance and security events.
• Investigate firewall incidents and outages.
• Review and implement firewall rule requests per standards.
• Conduct health checks and capacity planning.
• Collaborate with Cyber Security, Networking, Risk, and Apps teams.
• Participate in after-hours maintenance windows.
• Maintain operational docs and network diagrams.

Skills

Network security

Incident management

Change management

Threat mitigation

Security monitoring

Firewall administration

Education

Degree or Diploma in IT / Cyber Security

Tools

Cisco ASA

FTD

FMC

VPN

Job description

FNB South Africa is seeking an experienced Firewall Security Specialist to join the Infrastructure and Cybersecurity team. You will be responsible for admin, maintenance, monitoring, and optimization of enterprise firewall and network security platforms to safeguard banking systems.

The role demands strong knowledge of network security technologies, change management, threat mitigation, and operational support within a large-scale enterprise.