Sr. Network Security Engineer (F5)

Total-TECH Co; Riyadh; On-site; SAR 200,880 - 279,000; Full time

Job summary

Total-TECH Co is seeking a skilled professional to manage F5 Advanced WAF and BIG-IP LTM in Riyadh. The role includes overseeing load balancer performance, cleaning unused IPs, and ensuring compliance with security policies.

The ideal candidate should have hands-on experience with NAT, DNS routing, and change management in critical environments. Collaborating with cross-functional teams is essential to validate changes and maintain performance.

Qualifications

• Hands-on experience with NGFW NAT and access control management.
• Strong knowledge of IP addressing and DNS routing.
• Experience in mission-critical environments and change management.

Responsibilities

• Identify and clean unused orphaned IPs on F5 load balancers.
• Review and remove unused duplicate firewall policies.
• Ensure all changes align with HA and DR requirements.
• Audit and clean DNS records without service impact.
• Coordinate with cross-functional teams for post-change validation.

Skills

NGFW NAT and access control management

IP addressing

DNS routing

security architecture

HA/DR experience

change management

Job description

Job Description

Strong expertise in F5 Advanced WAF and BIG-IP LTM VIPs Self IPs SNATs HA Identify and clean unused orphaned IPs on F5 load balancers to improve performance Review and remove unused duplicate or obsolete firewall policies across HQ DR while maintaining security and compliance Ensure all changes align with HA and DR requirements Assess devices applications and network components using public IPs Analyze dependencies and evaluate impact of changes Classify firewall rules and DNS entries by usage and business criticality Plan cleanup migration timelines sequencing rollback Design private IP ranges aligned with architecture Audit and clean DNS records without service impact Perform secure controlled changes with minimal downtime Coordinate with cross-functional teams SOC apps ops Conduct post-change validation for availability security and performance Establish periodic reviews for firewall F5 IP and DNS Maintain detailed documentation for audits and compliance

Requirements

• Hands‑on NGFW NAT and access control management.
• Strong knowledge of IP addressing DNS routing and security architecture.
• Experience in HA/DR, mission‑critical environments, and change management.