Senior (L3) Network Engineer on a 12-month hybrid contract in Central London (3 days onsite), supporting IoT deployments in a Financial Services environment. Hands-on Cisco/Arista routing and switching — OSPF, VLANs, ACLs, multicast — plus packet-capture troubleshooting under CAB change control, with some Saturday change windows. Inside IR35 via umbrella.
8-10 years Network Engineering experience at Senior/L3 level
Strong Cisco and Arista routing and switching experience
Excellent knowledge of OSPF, VLANs, routing, and ACLs
Experience supporting IoT connectivity from a network infrastructure perspective
Strong multicast configuration and troubleshooting experience
Advanced network troubleshooting experience, including packet capture and root cause analysis
Recent experience working within Financial Services
Strong understanding of CAB/change control processes
CCNP required; CCIE highly desirable
Excellent communication and stakeholder management skills
Availability to support Saturday network change windows
Responsibilities:
Join a major network infrastructure programme supporting IoT deployments within a Financial Services environment
Provide senior-level network engineering support for routing, switching, and connectivity issues
Configure and troubleshoot multicast, OSPF, VLANs, routing, and ACLs
Support network troubleshooting activities, including packet capture and root cause analysis
Work within CAB and change control processes
Support scheduled change windows, including Saturday work as required
Technologies:
Cisco
IoT
Support
Network
Windows
More:
We are hiring on a 12-month contract for a Senior Network Engineer (L3) in a hybrid London role, with three days per week on site and some Saturday work required for scheduled change windows. This is a hands-on opportunity to join a major network infrastructure programme supporting IoT deployments in a Financial Services environment. The rate is £60-£62 per hour, deemed inside IR35 via umbrella, and the start date is ASAP following completion of background checks.