Network Infrastructure Engineer

The ONE Group Ltd; Cambridge; On-site; GBP 50,000 - 70,000; Full time

Job summary

A technology solutions provider in Cambridge is seeking a Senior Infrastructure Engineer to maintain and improve core network services. The ideal candidate will have strong experience in enterprise networking and security technologies, and will act as an escalation point for complex issues. This role requires hands-on involvement in upgrades and improvements while supporting a stable IT environment. Candidates must be located within one hour of Cambridge and the position is predominantly onsite.

Qualifications

• Strong experience supporting enterprise networking and infrastructure required.
• Confident in working with firewalls, switching, wireless, and VPN technologies.
• Solid understanding of cybersecurity fundamentals essential.

Responsibilities

• Maintain and improve core network and connectivity services.
• Ensure infrastructure is secure and performing as expected.
• Act as a senior escalation point for complex technical issues.

Skills

Supporting enterprise networking and infrastructure

Working with firewalls, switching, wireless, and VPN technologies

Supporting server and virtualisation systems

Knowledge of Microsoft 365 and identity platforms

Understanding cybersecurity fundamentals

Troubleshooting complex issues calmly and methodically

Job description

A senior technical role focused on keeping core systems reliable, secure, and ready for the future.

This position suits an experienced Infrastructure Engineer who enjoys ownership and responsibility. This role would suit someone who wants to look after critical infrastructure, resolve complex issues, and help shape how networks and platforms evolve over time. You’ll work within an established internal IT team, supporting an environment that needs to be both stable and resilient.

All candidates must be within 1 hour of Cambridge. The role will be predominantly onsite.

Role Style & Setup

This is a hands‑on infrastructure role with a balance of operational responsibility and improvement work. You’ll act as an escalation point for complex technical issues while also contributing to planned upgrades, security improvements, and system modernisation.

Key Responsibilities

• Maintain and improve the organisation’s core network and connectivity services
• Ensure infrastructure is secure, resilient, and performing as expected
• Support the network roadmap and network strategy
• Contribute to infrastructure upgrades, refreshes, and improvement initiatives
• Act as a senior escalation point for complex technical issues
• Produce and maintain clear technical documentation

Skills & Experience Required

• Strong experience supporting enterprise networking and infrastructure
• Confident working with firewalls, switching, wireless, and VPN technologies
• Experience supporting server, virtualisation, and directory services
• Good working knowledge of Microsoft 365 and identity platforms
• Solid understanding of cybersecurity fundamentals
• Ability to troubleshoot complex issues calmly and methodically

This is a senior position and wouldn’t be suitable for someone looking to get into their first Network/Infrastructure Engineer position – we need someone experienced for this role.

For more information and a full job description please contact Andy Clarke at The One Group.