Senior Network Architect Financial Services SD-WAN Security

Claranet; England; On-site; GBP 90,000 - 120,000; Full time

Job summary

Claranet is seeking a senior L4 Network Specialist to provide architectural governance and strategic direction for global networks within financial services clients. You will lead advanced troubleshooting, define standards, and guide network strategy in highly regulated environments, with emphasis on Netskope experience at engineering level.

You will mentor L1–L3 engineers, oversee lifecycle management across SDWAN, WAN, LAN/WLAN, VPN/SASE, and load-balancing, and contribute to IaC, monitoring,

Qualifications

• 7+ years’ hands-on experience in network engineering, architecture and support.
• Experience defining standards, leading complex troubleshooting, and driving network evolution.
• Advanced knowledge across SDWAN, WAN, LAN/WLAN, VPN/SASE, load-balancing, and security platforms.
• Fluent written and spoken English; able to produce audit-ready documentation for senior stakeholders.

Responsibilities

• Deliver architectural assurance, advanced support, and strategic direction for complex, multi-vendor network estates.
• Lead complex troubleshooting and root cause analysis across multi-vendor domains.
• Define and maintain configuration standards, security baselines, and golden templates to ensure compliance with financial services regulations.
• Oversee lifecycle management including firmware governance, vulnerability remediation, and audit readiness.
• Lead, mentor and develop L1–L3 engineers, fostering high performance through structured coaching, regular feedback, and continuous improvement initiatives.
• Provide design assurance for new deployments and service modernisation across SDWAN, WAN, LAN/WLAN, VPN/SASE, and load-balancing environments.
• Support and guide automation initiatives including Infrastructure-as-Code (IaC) pipelines, compliance validation, and drift detection.
• Drive monitoring and telemetry enrichment strategies to improve event correlation and reduce MTTR.
• Collaborate with vendor management teams on major incidents and strategic engagements.
• Support service modernisation, onboarding, and transition initiatives, ensuring seamless integration and regulatory compliance

Skills

BGP OSPF ACL NAT

Zero trust security

Infoblox IPAM DNS DHCP

Automation CI/CD (Python Terraform Ans

Stakeholder engagement

Architecture review & capacity

Tools

Infoblox

SolarWinds

ServiceNow

CI/CD tooling

Job description

Claranet is seeking a senior L4 Network Specialist to provide architectural governance and strategic direction for global networks within financial services clients. You will lead advanced troubleshooting, define standards, and guide network strategy in highly regulated environments, with emphasis on Netskope experience at engineering level.

You will mentor L1–L3 engineers, oversee lifecycle management across SDWAN, WAN, LAN/WLAN, VPN/SASE, and load-balancing, and contribute to IaC, monitoring,