Network Engineer L3

Essential Roles & Responsibilities

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• Diagnose and resolve complex incidents across SDWAN, WAN, LAN/WLAN, VPN/SASE, and load-balancing platforms, ensuring compliance with financial services regulations
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• Implement network configuration changes using approved templates and security baselines, maintaining audit trails
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• Validate device configurations, firmware posture, and compliance with golden standards and sector-specific requirements
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• Support onboarding of new sites/services using Zero-Touch Provisioning (ZTP) and Infrastructure-as-Code pipelines
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• Manage routing policies, QoS, wireless performance tuning, and load balancer configuration updates
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• Collaborate with vendor management teams on escalated transport or device issues, ensuring regulatory requirements are met
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• Contribute to CMDB enrichment through topology validation and asset reconciliation
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• Support automated impact assessments and change risk analysis, with a focus on operational resilience
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• Participate in continuous service improvement (CSI) initiatives, such as monitoring optimisation and capacity analysis
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• Provide technical guidance and mentoring to Level 2 engineers
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Financial Services & Regulatory Compliance

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

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

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• Advanced routing & switching (BGP/OSPF, ACLs, NAT)
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• SDWAN technologies (e.g. Fortinet, Cisco)
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• Wireless LAN operations and performance tuning
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• Familiarity with F5 or equivalent load-balancing platforms
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• Exposure to automation or scripting (Python, Terraform, Ansible)
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• Strong troubleshooting and analytical skills
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• Experience with network compliance, configuration management, and infrastructure documentation
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• Familiarity with automation frameworks and CI/CD for network configuration (Python, Terraform, Ansible)
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Behavioural Competencies – Organisational & Behavioural Fit

Essential:

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• 4+ years’ hands-on experience in network engineering, including advanced support and implementation for regulated/financial environments
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• Strong understanding of network principles, design, operational environments, and compliance requirements
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• Proven experience with complex incident resolution, change management, and performance optimisation
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• Experience with data centre network technologies, cloud and security services (Azure, AWS, Load Balancing, DNS)
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• Effective under pressure; strong written and verbal communication
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• Familiarity with ITSM workflows, SDWAN/VPN concepts, and ServiceNow
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• SASE management (Fortinet / Netskope)
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• Fluent written and spoken English is essential. The role requires the ability to produce audit ready documentation and communicate confidently with senior and executive level stakeholders
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Highly Desirable:

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

Personal Attributes:

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• Technical leader and mentor, passionate about advanced troubleshooting and optimisation
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• Strong compliance and risk awareness, with attention to regulatory detail
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Shift & Working Pattern:

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• Standard business hours, with participation in an oncall rota as required
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• Occasional weekend engineering coverage will be required, typically limited to a small number of planned weekends per year, to support business continuity, resilience testing, or disaster recovery activities
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