Firewall Security Engineer — Enterprise IT Security

Fnbnamibia; Randburg; On-site; ZAR 550,000 - 850,000; Full time

Job summary

FNB is seeking an experienced Firewall Security Specialist to join our Infrastructure and Cybersecurity team. You will be responsible for administration, maintenance, monitoring, and optimization of enterprise firewall environments, ensuring confidentiality, integrity and availability of critical banking systems.

The role requires strong knowledge of network security technologies, change management, threat mitigation, and operating within a large scale enterprise environment.

Qualifications

• Degree or Diploma in Information Technology, Network Engineering, Cyber Security, or related field.
• 3‑5+ years of hands-on firewall administration experience with enterprise environments.
• Experience supporting enterprise security platforms within a large corporate environment.

Responsibilities

• Administer and support enterprise firewall environments, including configuration, maintenance, and troubleshooting.
• Implement and manage security policies, ACLs, NAT, VPNs, and security zones.
• Perform firewall software upgrades, patching, and vulnerability remediation.
• Monitor firewall performance, availability, and security events.
• Investigate and resolve firewall-related incidents, outages, and performance issues.
• Review and implement approved firewall rule requests in accordance with security standards.
• Conduct firewall health checks, capacity planning, and lifecycle management.
• Collaborate with Cyber Security, Network Engineering, Risk, and Application teams during project implementations.
• Participate in after-hours maintenance windows and change implementations.
• Ensure compliance with organizational security standards, audit requirements, and regulatory obligations.
• Maintain accurate operational documentation, network diagrams, and configuration records.

Skills

Cisco ASA

Cisco Secure Firewall Threat Defense (

Education

Degree or Diploma in Information Technology, Network Engineering, Cyber Security, or related field

Tools

Cisco ACI

SIEM Platforms (Splunk, QRadar, Sentinel)

Cloud Security (Azure, AWS)

Job description

FNB is seeking an experienced Firewall Security Specialist to join our Infrastructure and Cybersecurity team. You will be responsible for administration, maintenance, monitoring, and optimization of enterprise firewall environments, ensuring confidentiality, integrity and availability of critical banking systems.

The role requires strong knowledge of network security technologies, change management, threat mitigation, and operating within a large scale enterprise environment.