L3 Network Engineer

Position Summary

The Level 3 Network Operations Engineer delivers advanced 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 all activities meet stringent regulatory, security, and compliance standards.

Primary Purpose

Provide expert technical leadership for diagnosing, resolving, and optimising complex network issues. Lead configuration management and compliance, support onboarding and automation initiatives, and drive continuous improvement within regulated environments.

Duties and Responsibilities

Essential Roles & Responsibilities

• Diagnose and resolve complex incidents across SDWAN, WAN, LAN/WLAN, VPN/SASE, and load-balancing platforms, ensuring compliance with financial services regulations
• Implement network configuration changes using approved templates and security baselines, maintaining audit trails
• Support onboarding of new sites/services using Zero-Touch Provisioning (ZTP) and Infrastructure-as-Code 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

Financial Services & Regulatory Compliance

• Ensure all network operations adhere to financial services regulations and frameworks (e.g., FCA, PRA, DORA, ISO 27001, SOC)
• Maintain documentation and audit trails for all changes, incidents, and compliance activities
• Support risk assessments, compliance reviews, and operational audits as required
• Integrate regulatory requirements and security controls into network designs and operations

Governance & Reporting

• Maintain accurate incident, request, and change records in ServiceNow
• Produce and present operational reports, dashboards, and summaries for internal and customer stakeholders, highlighting compliance, risk management, and performance
• Support governance initiatives including process improvement, risk analysis, and post-implementation reviews

Key Skills

• Advanced routing & switching (BGP/OSPF, ACLs, NAT)
• SDWAN technologies (e.g. Fortinet, Cisco)
• Wireless LAN operations and performance tuning
• Familiarity with F5 or equivalent load-balancing platforms
• Exposure to automation or scripting (Python, Terraform, Ansible)
• Familiarity with automation frameworks and CI/CD for network configuration (Python, Terraform, Ansible)

Position Specifications

Behavioural Competencies – Technical

Essential:

• 4+ years’ hands-on experience in network engineering, including advanced support and implementation for regulated/financial environments
• Proven experience with complex incident resolution, change management, and performance optimisation
• Experience with data centre network technologies, cloud and security services (Azure, AWS, Load Balancing, DNS)
• Effective under pressure; strong written and verbal communication
• Familiarity with ITSM workflows, SDWAN/VPN concepts, and ServiceNow
• SASE management (Netskope)

Highly Desirable:

• Experience in managed service or telecom environments, especially for financial services clients
• Hands-on provisioning/troubleshooting with Voice technologies (Avaya, Cisco Call Manager)
• Relevant certifications (CCNP, Fortinet NSE5/7, Meraki ECMS2, F5)
• Experience with SolarWinds, Infoblox, Zero-Touch Deployment, automation tools