Network Test Engineer

Role: Senior Network Testing Engineer

Location

London / Newbury / Birmingham / Manchester / Glasgow, UK (Hybrid) with customer site visits 1 or 2 days a month; Newbury attendance is mandatory.

Positions: Contract (Outside IR35)

Relevant experience in the below areas

• SD-WAN / LAN/Wi-Fi / SIP/VoIP
• Data Centre Testing
• Network & Connectivity Testing
• LAN/WAN Testing
• Network Protocols: TCP/IP, DHCP, DNS, NAT, BGP, OSPF
• Routing & Switching
• SD-WAN validation and troubleshooting
• Network performance testing using iPerf, Spirent, IxNetwork, or any similar tools

KEY RESPONSIBILITIES

• Own test design and execution for assigned workstreams across the client estate.
• Review requirements, HLDs, LLDs and project documentation to identify test scenarios and coverage gaps.
• Produce and peer-review test scripts, test cases and execution evidence to sign-off standard.
• Lead defect triage, root-cause analysis and retest coordination across delivery, design, engineering and operations teams.
• Validate System Integration, Functional, Non-Functional, Disaster Recovery and Operational Acceptance test coverage before execution windows open.
• Provide technical guidance and mentoring to Test Engineers; raise the standard of scripts, evidence and defect records across the workstream.
• Maintain ALM discipline: test case structure, requirements traceability, defect lifecycle and reporting accuracy.
• Execute and lead complex testing across routers, switches, firewalls, hosting, data centre, LAN/WiFi, SD-WAN, UC & Unity, telephony, mobility, MPN & cloud, IoT, fixed connectivity, cloud & security and service transition.
• Set up and validate complex test environments, including network test equipment and RFC 2544 performance testing where required.
• Support Test Managers with status reporting, risk identification, defect trend analysis and milestone readiness assessments.
• Represent testing in technical design discussions, ensuring testability is considered in HLD/LLD reviews.
• Interface confidently with client stakeholders and customer representatives in test working groups and triage calls.
• Escalate risks and blockers within the same working day, with proposed mitigations rather than bare problems.
• Drive reuse: contribute and curate test assets, automation candidates and AI-assisted test design patterns supporting the programme's 5% / 10% / 18% cumulative productivity commitments.
• Support onboarding, knowledge transfer and continuity across joiners and leavers with no impact to the Project Test Plan.
• Comply with client security policy, data handling and audit requirements at all times, on and off site.
• Attend client hubs and customer sites as required, including Newbury HQ liaison with the wider Test team and, where applicable, the customer lab in Spain.