Network Engineer

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

Job summary

CBSbutler Holdings Limited trading as CBSbutler seeks an experienced Network Contractor to support a major campus network redesign and remediation programme in Cambridge. This onsite contract role offers a day rate of £400-£440 inside IR35, with planned evening and weekend change windows.

You will review topology, configure Cisco routers and switches, resolve L2/L3 issues, and produce MOPs, HLD/LLD, and documentation. CCNA/CCNP and disciplined change-control are required.

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 networking/wireless 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.
• CCNP-level knowledge is desirable.
• Cisco Catalyst experience is desirable.
• Campus redesign/migration experience is desirable.
• Experience in mixed Cisco/Aruba environments is desirable.
• HLD/LLD experience is desirable.
• Exposure to network automation or configuration management is desirable.

Responsibilities

• Review our existing campus network topology and configurations.
• Identify and remediate legacy, redundant, inconsistent or obsolete configuration.
• Support our 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 our 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 our internal engineering teams while operating independently when required.
• Participate in planned production changes and migrations, including change planning, risk assessment, implementation documentation, troubleshooting during implementation, and planned evening and weekend maintenance windows.

Skills

CCNA

Routing & Switching

OSPF

BGP

Campus network

Troubleshooting

Legacy configuration cleanup

Cisco wireless

Aruba networking

Change control

Technical documentation

On-site Cambridge

Evening/weekend support

CCNP desirable

Cisco Catalyst

Campus redesign/migration

Mixed Cisco/Aruba

HLD/LLD

Network automation exposure

Tools

Aruba

Cisco

Support

Network

Windows

LAN

TCP/IP

Job description

Salary: £? - ? per year

Requirements

• CCNA or demonstrable equivalent 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 networking/wireless 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.
• CCNP-level knowledge is desirable.
• Cisco Catalyst experience is desirable.
• Campus redesign/migration experience is desirable.
• Experience in mixed Cisco/Aruba environments is desirable.
• HLD/LLD experience is desirable.
• Exposure to network automation or configuration management is desirable.

Responsibilities

• Review our existing campus network topology and configurations.
• Identify and remediate legacy, redundant, inconsistent or obsolete configuration.
• Support our 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 our 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 our internal engineering teams while operating independently when required.
• Participate in planned production changes and migrations, including change planning, risk assessment, implementation documentation, troubleshooting during implementation, and planned evening and weekend maintenance windows.

Technologies

• Aruba
• Cisco
• Support
• Network
• Windows
• LAN
• TCP/IP

More

We are seeking an experienced Network Contractor to support a major Main Campus Network Redesign and Remediation programme in Cambridge. This is an onsite contract role, paid at £400-£440 per day inside IR35, with planned evening and weekend change windows. You will work alongside our existing network and infrastructure teams to improve network stability, resilience, supportability and configuration standards, with out-of-hours work agreed in advance wherever reasonably possible.