Senior Cisco ACI Network Specialist (SC Cleared)
- Location: London (Hybrid - 1-2 days onsite)
- Contract: 6 months
- Rate: £700 Inside IR35
We're looking for an SC Cleared Senior Cisco ACI Network Specialist to join a major enterprise datacentre transformation programme within a highly regulated environment.
This is a hands-on, ACI-first role focused on upgrading, modernising, and standardising large-scale Cisco ACI and Nexus fabric environments. You'll be working across multiple enterprise datacentre fabrics, delivering upgrades, platform refreshes, and fabric modernisation as part of a long-term, Cisco-led strategy.
What You'll Be Doing
- Delivering Cisco ACI fabric upgrades across multiple enterprise environments
- Supporting the modernisation of ACI orchestration and management platforms
- Leading APIC platform refresh and ACI platform upgrades
- Working on Nexus fabric and ACI control-plane modernisation
- Designing and maintaining ACI policy models (tenants, VRFs, BDs, EPGs, contracts, L4-L7)
- Contributing to underlay/overlay fabric design (EVPN/VXLAN, IS-IS/BGP)
- Producing design documents, upgrade plans, and implementation runbooks
- Leading and supporting high-risk, out-of-hours change and upgrade activities
- Troubleshooting complex ACI fabric, APIC, and policy-related issues
- Working closely with security, compute, storage, and cloud teams
What We're Looking For
- Active SC Clearance (mandatory)
- Strong hands-on experience with Cisco ACI in large enterprise environments
- Proven experience delivering ACI upgrades and platform refreshes
- Deep knowledge of:
- APIC
- ACI policy model
- Multi-site ACI environments
- Strong Nexus / NX-OS experience
- Strong understanding of EVPN/VXLAN and underlay/overlay architectures
- Experience working in highly regulated, business-critical environments
- Excellent troubleshooting skills in complex fabric environments