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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Network Operation Support L2/L3 - **Company:** HCLTech - **Location:** London, UK - **Salary:** £30,000.0 - £50,000.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, Microsoft Azure, Border Gateway Protocol, Cloud Computing, Data Centers, Dynamic Multipoint Virtual Private Networks, Enhanced Interior Gateway Routing Protocol, Extranet, Internet Protocol Security (IP SEC), Virtual Private Networks (VPN), Multi-protocol Systems, Python (Programming Language), Network Layer, Multicasting, NetFlow, Network Control, Routing, Cisco Nexus Switches, Open Shortest Path First (OSPF), Overlay Transport Virtualization, Ansible, Simple Network Management Protocols, Syslog, Systems Integration, Wireshark, Virtual Local Area Networks, Scripting, Computer Networking Systems, Apache Spark, HybridCloud, Firewalls (Computer Science), Amazon Virtual Private Cloud (VPC), Terraform, Cisco, SSL VPN - **Published:** September 30, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5896695389 ## About the Role * Strong experience in routing and switching design, implementation, and troubleshooting for complex enterprise networks. * Hands-on knowledge of BGP, OSPF, EIGRP, static routing, route redistribution, ACLs, route maps, policy-based routing, and QoS. * Experience supporting large-scale datacenter environments with Cisco Nexus 5K/7K/9K, Cisco ACI, DCNM/NDFC, VXLAN EVPN, and spine-leaf architecture. * Experience with datacenter technologies including VLANs, VPC, STP, RSTP, MST, port channels, multicast, and Layer 2/Layer 3 troubleshooting. * Experience designing, supporting, and troubleshooting Site-to-Site IPSEC VPNs, including IKE, IPSEC phases, tunnel failures, encryption domain mismatches, and routing over VPN tunnels. * Experience with GRE over IPSEC, DMVPN, extranet connectivity, and B2B VPN integrations. * Experience coordinating with firewall teams for VPN implementation and troubleshooting. * Experience in incident and problem management, including L3 escalation handling, RCA leadership, and major incident support. * Experience driving change and project delivery, including CAB reviews, risk assessments, implementation plans, rollback strategies, and validation procedures. * Experience creating SOPs, KT documents, architecture diagrams, and network governance documentation. * Familiarity with automation and scripting tools such as Python, Ansible, and Terraform. * Required technical skills in BGP, OSPF, EIGRP, MPLS, VRF, and policy-based routing. * Required technical skills in Cisco Nexus, Cisco ACI, VXLAN EVPN, spine-leaf architecture, VPC, and STP/RSTP/MST. * Required technical skills in IPSEC VPN, IKEv1/IKEv2, GRE tunnels, DMVPN, SSL VPN, and route-based and policy-based VPNs. * Required technical skills in Wireshark, Cisco ThousandEyes, NetFlow, SNMP, and syslog analysis. * Required technical skills in AWS Direct Connect, Azure ExpressRoute, and hybrid cloud networking. * Preferred certifications include CCNP Enterprise, CCIE Enterprise Infrastructure, CCNP Security, CCIE Security, Cisco ACI Specialist, AWS Advanced Networking Specialty, and Azure Network Engineer Associate. * Strong customer and stakeholder management skills. * Strong executive communication skills. * Experience leading major incidents. * Strong problem-solving and analytical skills. * Experience mentoring and coaching L1/L2 engineers. ## Description * We design, implement, and troubleshoot complex enterprise networks. * We manage and support routing protocols and optimize routing convergence and performance. * We configure and troubleshoot ACLs, route maps, policy-based routing, and QoS. * We support large-scale datacenter environments and perform datacenter migrations, refreshes, and transformation activities. * We manage VLANs, VPC, STP, RSTP, MST, port channels, and multicast technologies. * We provide expertise in Layer 2 and Layer 3 datacenter troubleshooting. * We design and support Site-to-Site IPSEC VPN solutions and troubleshoot VPN connectivity issues. * We coordinate with firewall teams for VPN implementation and troubleshooting. * We act as the L3 escalation point for critical incidents and major outages. * We lead RCA investigations and corrective actions. * We provide technical leadership during Severity-1 incidents. * We reduce recurring incidents through automation and process improvements. * We evaluate and implement complex infrastructure changes. * We participate in CAB reviews and risk assessments. * We drive network modernization and cloud connectivity projects. * We develop implementation plans, rollback strategies, and validation procedures. * We create SOPs, KT documents, and architecture diagrams. * We leverage automation tools and scripting where applicable. * We maintain network standards and governance documentation. * We work toward network availability, SLA compliance, reduced incident recurrence, successful project delivery, timely RCA completion, and improved security and operational efficiency. Technologies: * AI * AWS * Ansible * Azure * Cloud * Cisco * Firewall * Support * MPLS * Network * Nexus * Python * Security * Terraform * VPN * Spark ## Related Videos - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Better Together: Leveraging Your Observability Tools as a SIEM](https://www.wearedevelopers.com/videos/2118-better-together-leveraging-your-observability-tools-as-a-siem) - [Dev & Test in the Cloud? 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