Senior Network Security Engineer
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Key skills for this role
About the Role
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, dup.
Key Skills for This Role
Responsibilities
- Identify and clean up unused or orphaned IP addresses on F5 BIG IP load balancers
- Review, validate, and remove unused, duplicate, or obsolete firewall policies across HQ and DR data centers
- Ensure firewall and load balancer changes are aligned with HA and DR requirements
- Perform comprehensive assessment of all devices, applications, databases, and network components using public IP addresses
- Analyze application, service, and security dependencies to determine impact of changes
- Classify firewall rules and DNS related entries based on criticality, usage, activity level, and business relevance
- Develop detailed cleanup and migration plans including sequencing, timelines, backups, and rollback procedures
- Design and allocate private IP address ranges, ensuring compatibility with existing architecture
- Assess and analyze DNS records to identify unused, outdated, or invalid entries
- Remove or update invalid, obsolete, or unnecessary DNS records while ensuring no impact
- Execute cleanup and migration activities in a secure, controlled, and auditable manner
- Coordinate with application, systems, SOC, and operations teams to align controls
Requirements
- 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
Full Job Posting
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 across HQ and DR data centers while maintaining security posture and compliance.
- Ensure firewall and load balancer changes are aligned with high availability (HA) and disaster recovery (DR) requirements.
- Perform a comprehensive assessment of all devices, applications, databases, and network components using public IP addresses.
- Analyze application, service, and security dependencies to determine the potential impact of IP, firewall, and load balancer changes.
- Classify firewall rules and DNS related entries based on criticality, usage, activity level, and business relevance.
- 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 identify unused, outdated, or invalid entries related to applications and security controls.
- Remove or update invalid, obsolete, or unnecessary DNS records while ensuring no impact on applications or end users.
- Execute cleanup and migration activities in a secure, controlled, and auditable manner, ensuring uninterrupted service continuity.
- Coordinate with application, systems, SOC, and operations teams to align firewall rules, NAT, routing, DNS, and access controls.
Qualifications
- 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.
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