Network SRE

Senior Network SRE (Contract)

Location: On-site 5 days a week in London
Rate: £500 per day
Contract: Inside IR35

We're looking for a Senior Network Site Reliability Engineer (SRE) to join a global network operations team supporting large-scale, business-critical infrastructure. This is a hands-on, high-impact contract role where you'll play a key part in keeping complex network environments reliable, scalable, and performant.

You'll take ownership of major incidents, troubleshoot deep technical issues, and drive automation and observability across a multi-vendor estate.

The role:

• Lead incident management for critical network issues, owning resolution during outages and high-pressure situations
• Troubleshoot complex network problems across routing, switching, Firewalling, and wireless environments
• Provide technical leadership, setting direction and mentoring other engineers
• Operate in a 24/7 environment, participating in a shift-based support model
• Work across a multi-vendor estate, including Arista, Cisco, Cumulus, Palo Alto, Check Point, F5, Netscaler, Aruba, Mist, A10, Spectrum Ethernet, and InfiniBand
• Support network security and segmentation, including VPN solutions such as GlobalProtect and AnyConnect
• Drive automation and observability, using modern monitoring, alerting, and configuration tools
• Contribute to innovation projects, including wireless design and AI cluster deployments

Requirements:

• 10+ years ofhands-on experience in network engineering and operations
• Deep expertise in routing, switching, Firewalling, and wireless
• Strong understanding of overlay and underlay networking
• Solid experience in Linux/Unix environments
• Proven ability to work independently and take technical ownership

Technical stack & tooling:

Network & Architecture (one required):

• EVPN & Segment Routing
• or significant MPLS expertise

Tools & Platforms:

• NetBox/Nautobot
• Prometheus/VictoriaMetrics
• Salt
• Grafana, Splunk, syslog
• ServiceNow, BigPanda, ITMP
• Ansible

Nice to have

• Experience with InfiniBand and AI cluster deployments
• Wireless design experience (Cisco, Mist, Aruba)
• Strong background in network asset management

Please apply with a copy of your CV and Emma from SR2 will contact potential candidates regarding next steps.