Onsite Network Redesign Engineer — CCNA/CCNP

CBSbutler Holdings Limited trading as CBSbutler; Cambridge; On-site; GBP 74,000 - 81,000; Full time

Job summary

CBSbutler Holdings Limited trading as CBSbutler is seeking an experienced Network Contractor to support a major Main Campus Network Redesign and remediation programme in Cambridge.

This is an onsite role in Cambridge with planned evening and weekend change windows, requiring hands-on Cisco routing and switching, OSPF, BGP and wireless expertise to improve network stability, resilience and standardisation.

Qualifications

• CCNA or demonstrable Cisco networking experience.
• Strong Cisco routing and switching background.
• Practical OSPF and working BGP experience.
• Enterprise campus network experience.
• Strong network troubleshooting skills.
• Experience cleaning up and standardising legacy configurations.
• Cisco wireless knowledge and Aruba experience.
• Experience working under formal change-control processes.
• Strong technical documentation skills.
• Ability to work onsite in Cambridge.
• Flexibility to support planned evening/weekend changes.

Responsibilities

• Review existing campus network topology and configurations.
• Identify and remediate legacy, redundant, inconsistent or obsolete configuration.
• Support network redesign and logical simplification.
• Configure and troubleshoot Cisco routers and switches.
• Troubleshoot complex Layer 2/Layer 3 connectivity and routing issues.
• Review and remediate VLANs, SVIs, trunks, port channels, routing and associated configuration.
• Support migration from legacy configurations to the agreed target design.
• Identify and remediate unused VLANs, interfaces, static routes, ACLs, prefix lists, route maps and unnecessary routing advertisements.
• Support Cisco wireless environments and troubleshoot basic Aruba networking/wireless issues.
• Prepare and implement controlled production network changes.
• Produce MOPs, implementation plans, rollback procedures and validation plans.
• Complete pre- and post-change testing and documentation.
• Produce accurate HLD/LLD, as‑built, topology, routing and operational documentation.
• Work collaboratively with internal engineering teams while operating independently when required.

Skills

Cisco Routing & Switching

OSPF

BGP

Wireless

Change Windows

Onsite Cambridge

Documentation

Job description

CBSbutler Holdings Limited trading as CBSbutler is seeking an experienced Network Contractor to support a major Main Campus Network Redesign and remediation programme in Cambridge.

This is an onsite role in Cambridge with planned evening and weekend change windows, requiring hands-on Cisco routing and switching, OSPF, BGP and wireless expertise to improve network stability, resilience and standardisation.