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DeepSource Technologies is an IT staffing and recruitment firm that specializes in sourcing and connecting businesses with technical talent, as stated in its own company description on its careers page.

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Posted 1mo ago

Senior Network Security Engineer - Riyadh, KSA

@ DeepSource Technologies
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Riyadh, Riyadh Province, Saudi Arabia
OnsiteFull Time
Responsibilities:assessing networks, removing rules, validating changes
Requirements Summary:Hands-on experience with NGFW and F5 BIG-IP (LTM) including WAF, strong IP/DNS/routing knowledge, HQ/DR and HA environments, change management, and risk mitigation; bachelor\u0002s preferred and relevant security certifications preferred.
Technical Tools Mentioned:F5 BIG-IP (LTM), F5 Advanced WAF, NGFW, DNS
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Job Description

• Deep technical experience on F5 advanced WAF

• 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.

Network & Security Assessment

• 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.

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• Assess and analyze DNS records to identify unused, outdated, or invalid entries related to applications and security controls.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.

Secure Execution & Validation

• 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.

• Perform 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 ensure ongoing accuracy and security.

• Ensure cleanup activities do not negatively impact applications, services, or end users.

• Maintain comprehensive documentation for all activities, including changes implemented, issues encountered, root cause analysis, and approved remediation actions.

• Support audit, compliance, and regulatory requirements through proper documentation and change tracking.