About the Role
This position requires deep technical expertise in F5 advanced Web Application Firewall (WAF) management. The primary focus will be on enhancing the performance and efficiency of F5 BIG-IP load balancers, while maintaining a secure and compliant environment across HQ and DR data centers.
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Key Responsibilities
- Identify and clean up unused or orphaned IP addresses on F5 BIG-IP load balancers to improve performance, efficiency, and manageability.
- Review, validate, and remove unused, duplicate, or obsolete firewall policies while ensuring the security posture and compliance are maintained.
- Align firewall and load balancer changes with high availability (HA) and disaster recovery (DR) requirements.
Network & Security Assessment
- Perform a comprehensive assessment of devices, applications, databases, and network components using public IP addresses.
- Analyze dependencies among applications, services, and security to evaluate the impact of changes to IP, firewalls, and load balancers.
- Classify firewall rules and DNS entries based on criticality, usage, activity level, and business relevance.
IP Addressing & DNS Governance
- Develop detailed cleanup and migration plans, including sequencing, timelines, backups, and rollback procedures.
- Design and allocate private IP address ranges, ensuring compatibility with existing network and security architecture.
- Assess and analyze DNS records to find and update or remove unused, outdated, or invalid entries related to applications and security controls.
Secure Execution & Validation
- Execute cleanup and migration activities securely, ensuring uninterrupted service continuity.
- Coordinate with application, systems, Security Operations Center (SOC), and operations teams on firewall rules, NAT, routing, DNS, and access controls.
- Conduct post-change testing and validation to confirm service availability, security enforcement, and performance stability.
Governance, Review & Documentation
- Establish periodic review procedures for firewall rules, F5 configurations, IP addressing, and DNS records to maintain ongoing accuracy and security.
- Ensure cleanup activities do not adversely affect applications, services, or end users.
- Maintain comprehensive documentation of all activities, including implemented changes, issues encountered, root cause analyses, and approved remediation actions.
- Support audit, compliance, and regulatory requirements through proper documentation and change tracking.
Required Skills & Experience
- Strong hands-on experience with firewalls (NGFW), security policies, NAT, and access control management.
- Proven expertise in F5 BIG-IP (LTM), including VIPs, Self IPs, SNATs, and HA configurations.
- Solid understanding of enterprise IP addressing, DNS, routing, and network security architecture.
- Experience operating in HQ / DR, high-availability, and mission-critical environments.
- Strong knowledge of change management, rollback planning, and risk mitigation.
Education & Certifications (Preferred)
- Bachelor’s degree in Computer Science, Information Technology, or a related field.
- Certifications such as CCNP Security, F5-CA/CTS, NSE, or equivalent.
