Job Description
Network Contractor - Main Campus Network Redesign n
Location:
Cambridge - Onsite
Rate:
£400-£440 per day, Inside IR35
Contract:
Network Contractor
Working Pattern:
Onsite, with planned evening/weekend change windows
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We are seeking an experienced
Network Contractor
to support a major Main Campus Network Redesign and Remediation programme in Cambridge.
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This is a hands-on role requiring strong
Cisco routing and switching
, enterprise campus networking, OSPF, BGP and wireless experience. You will work alongside existing network and infrastructure teams to improve network stability, resilience, supportability and configuration standards.
Key Responsibilities n
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Review existing campus network topology and configurations.
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Identify and remediate legacy, redundant, inconsistent or obsolete configuration.
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Support network redesign and logical simplification.
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Configure and troubleshoot Cisco routers and switches.
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Troubleshoot complex Layer 2/Layer 3 connectivity and routing issues.
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Review and remediate VLANs, SVIs, trunks, port channels, routing and associated configuration.
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Support migration from legacy configurations to the agreed target design.
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Identify and remediate unused VLANs, interfaces, static routes, ACLs, prefix lists, route maps and unnecessary routing advertisements.
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Support Cisco wireless environments and troubleshoot basic Aruba networking/wireless issues.
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Prepare and implement controlled production network changes.
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Produce MOPs, implementation plans,



rollback procedures and validation plans.
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Complete pre- and post-change testing and documentation.
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Produce accurate HLD/LLD, as-built, topology, routing and operational documentation.
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Work collaboratively with internal engineering teams while operating independently when required.
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Technical Requirements n
Cisco Routing & Switching
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Robust hands-on Cisco enterprise networking experience.
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Excellent Layer 2/Layer 3 and TCP/IP knowledge.
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VLANs, trunks, SVIs, port channels and Spanning Tree.
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Enterprise campus network design and resilient network architectures.
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Network configuration remediation and standardisation.
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OSPF
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Practical configuration and troubleshooting experience.
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Neighbour relationships, areas, route advertisement and summarisation.
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Path selection, costs, default routes and redistribution.
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BGP
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Working knowledge of eBGP/iBGP.
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Neighbour configuration and route advertisement.
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Prefix lists, route maps and filtering.
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Path selection, Local Preference, MED and AS Path.
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Troubleshooting BGP neighbour and routing issues.
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Wireless
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Cisco Wireless LAN Controllers, APs,



WLANs/SSIDs and VLAN integration.
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Enterprise wireless and client connectivity troubleshooting.
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Working knowledge of Aruba networking and/or wireless environments.
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Change & Out-of-Hours Working n
The contractor will participate in planned production changes and migrations, including:
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Change planning, risk assessment and implementation documentation.
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MOPs and rollback procedures.
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Pre/post-change validation.
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Troubleshooting during implementation.
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Planned evening and weekend maintenance windows.
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Out-of-hours work will be agreed in advance wherever reasonably possible.
Essential Experience n
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CCNA or demonstrable equivalent Cisco networking experience.
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Strong Cisco routing and switching background.
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Practical OSPF and working BGP experience.
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Enterprise campus network experience.
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Strong network troubleshooting skills.
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Experience cleaning up and standardising legacy configurations.
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Cisco wireless knowledge and Aruba networking/wireless experience.
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Experience working under formal change-control processes.
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Strong technical documentation skills.
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Ability to work onsite in Cambridge.
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Flexibility to support planned evening/weekend changes.
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Desirable:
CCNP-level knowledge, Cisco Catalyst experience, campus redesign/migration experience, mixed Cisco/Aruba environments, HLD/LLD experience and exposure to network automation or configuration management.
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📌 Network Engineer - Ccna/Ccnp (Western Australia)
🏢 CBSbutler
📍 Western Australia