Network Test Engineer - SD-WAN & Network Infrastructure

Job DescriptionWe are hiring “Senior Network Test Engineer - SD-WAN & Network Infrastructure” for a global service provider based out of: London Speechmark / Newbury / Birmingham Small Heath / Manchester / Glasgow - Telecom/network infrastructure testing experience mandatory Contract: 6-12 Months Fixed-Term ContractClearance: SC Cleared / Eligible for SC ClearanceExperience: 5+ Years Role Overview The successful candidate must have practical experience testing and validating SD-WAN, LAN/WAN, Wi-Fi, routing and switching, network protocols, connectivity, data centre infrastructure and network performance.This is not a generic software QA or automation testing role. Candidates must demonstrate hands-on experience with network infrastructure testing and troubleshooting. Key Responsibilities Design, develop, execute and manage end-to-end testing for telecom and network infrastructure projects. Create and review test cases, test scripts, test plans and execution evidence. Perform SIT, Functional, Non-Functional, DR and OAT testing. Execute network and connectivity testing across SD-WAN, LAN/WAN, Wi-Fi and Data Centre environments. Validate routers, switches, firewalls and network infrastructure components. Perform testing and troubleshooting of TCP/IP, DHCP, DNS and NAT. Validate routing and switching technologies, including BGP and OSPF. Perform SD-WAN validation, connectivity testing and troubleshooting. Conduct network performance testing, including throughput, latency, jitter and packet-loss validation. Use network performance and traffic-generation tools such as iPerf, Spirent, IxNetwork/Ixia or similar tools. Perform RFC 2544 testing and network performance benchmarking. Test SIP/VoIP and Unified Communications connectivity where required. Support Data Centre, Cloud and network infrastructure testing. Manage the full defect lifecycle, including defect logging, root cause analysis, retesting and closure. Work from HLD, LLD, Test Plans and technical requirements. Maintain requirements traceability, ALM and test reporting. Prepare and maintain test environments and network test labs. Mentor junior testers and collaborate with network architects, engineers and cross-functional stakeholders. Essential Experience Minimum 5 years of hands-on telecom/network infrastructure testing experience. Strong experience testing enterprise or telecom network infrastructure. Hands-on experience with SD-WAN, routing, switching and network connectivity testing. Experience testing network protocols including TCP/IP, DHCP, DNS and NAT. Experience with routing protocols such as BGP and OSPF. Experience using network testing/performance tools such as iPerf, Spirent, IxNetwork/Ixia or similar. Experience performing network performance testing and RFC 2544 testing. Ability to create and execute test cases from HLD, LLD and Test Plans. Strong experience in defect management, root cause analysis and retesting. Experience with ALM or equivalent test management tools.