Senior Network Architect — Hybrid, London

HCLTech; Slough; Hybrid; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Vacation benefits

Insurance

Job summary

HCLTech is seeking an experienced Network Consultant in London with a hybrid work model to design, implement, and optimize enterprise networks across data centers and WANs. You will manage routing protocols, VPNs, and datacenter technologies while coordinating with global teams to ensure high availability and security.

The role covers complex routing, datacenter operations, VPN design, incident management, and automation with scripting where applicable.

Qualifications

• :

Responsibilities

• Design, implement, and troubleshoot complex enterprise networks.
• Manage and support routing protocols including: BGP, OSPF, EIGRP, Static Routing, Route Redistribution.
• Analyze routing issues and optimize network convergence.
• Configure and troubleshoot ACLs, route maps, policy-based routing, and QoS.
• Support large-scale datacenter environments using Cisco Nexus 5K/7K/9K, Cisco ACI, VXLAN EVPN time.
• Perform datacenter migrations, refreshes, and transformation activities.
• Manage VLANs, VPCs, STP, RSTP, MST, Port Channels, and multicast technologies.
• Design and support Site-to-Site IPSEC VPN solutions, troubleshoot Phase 1/Phase 2, tunnels and encryption domains.
• Act as L3 escalation point for incidents; lead root-cause analysis and RCA.
• Drive network modernization and cloud connectivity projects; develop implementation plans and rollback strategies.
• Create SOPs, KT documents, and architecture diagrams; use Python, Ansible, Terraform for automation in some cases.

Skills

Strong customer and stakeholder mgmt

Executive communication

Leadership and mentoring

Networking troubleshooting

Tools

Cisco Nexus

Cisco ACI

VXLAN EVPN

Spine-Leaf Architecture

VPC

STP/RSTP/MST

IPSEC VPN

IKEv1 / IKEv2

GRE Tunnels

DMVPN

SSL VPN

Python

Ansible

Terraform

Job description

HCLTech is seeking an experienced Network Consultant in London with a hybrid work model to design, implement, and optimize enterprise networks across data centers and WANs. You will manage routing protocols, VPNs, and datacenter technologies while coordinating with global teams to ensure high availability and security.

The role covers complex routing, datacenter operations, VPN design, incident management, and automation with scripting where applicable.