Hiring: Cisco ACI Engineer | £650/day | Hybrid (2 Days Onsite – Sheffield) My Global consultancy client are looking for a Cisco ACI Engineer to join an exciting Firewall Infrastructure project with a leading enterprise client. This is a contract opportunity offering £550 per day and requires 2 days onsite per week in Sheffield . Key Responsibilities: Serve as a Technical Subject Matter Expert on a major Firewall infrastructure project. Collaborate closely with stakeholders to ensure technical deliverables are achieved. Oversee and manage vendor relationships across both project delivery and technical domains. About You: Strong experience as a Data Network & Security Specialist within large-scale enterprise networks. Deep technical expertise in networking technologies , especially SDN including Cisco ACI , spine & leaf architectures , and vendors such as Cisco and Arista . Hands-on knowledge in Subnetting , Switching , Routing , VLANs , VRFs , NAT , VXLAN , EVPN , etc. Proficiency in Infrastructure as Code