Senior Network Engineer (L3) — FinServ, Netskope & SD-WAN

Claranet

England

On-site

GBP 65,000 - 100,000

Full time

14 days+

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Job summary

Claranet is seeking a Level 3 Network Operations Engineer to provide expert operational support, configuration management, and lifecycle maintenance across the network estate for financial services clients.

The role focuses on complex incident resolution, change execution, and performance optimisation for SDWAN, WAN, LAN/WLAN, VPN/SASE and load-balancing environments, ensuring regulatory, security, and compliance standards are met.

Qualifications

Diagnose and resolve complex incidents across SDWAN, WAN, LAN/WLAN, VPN/SASE, and load-balancing platforms with regulatory compliance.
Implement network configuration changes using approved templates and security baselines with audit trails.
Validate device configurations, firmware posture, and compliance with golden standards and sector-specific requirements.
Support onboarding of new sites/services using Zero-Touch Provisioning (ZTP) and IaC pipelines.
Manage routing policies, QoS, wireless performance tuning, and load balancer configuration updates.
Collaborate with vendor management teams on escalated transport or device issues ensuring regulatory requirements are met.

Responsibilities

Maintain CMDB enrichment through topology validation and asset reconciliation.
Support automated impact assessments and change risk analysis focusing on operational resilience.
Participate in continuous service improvement (CSI) initiatives, such as monitoring optimisation and capacity analysis.
Provide technical guidance and mentoring to Level 2 engineers.