Senior Infrastructure Engineer

Up to £50,000 | 5 Days Onsite | Infrastructure / Networking / Windows Server

• Salary up to £50,000 depending on experience
• Wimbledon based – onsite Monday to Friday
• Technical ownership across infrastructure, networking, Windows environments and security
• Established business offering autonomy, varied technical work and long-term career development

We’re supporting an established IT services business in Wimbledon that’s looking for an experienced Senior Infrastructure Engineer to join its technical team.

The business works closely with its customers, taking the time to understand their environments and deliver reliable, well-considered technical solutions.

Unlike some traditional IT services environments, the focus here isn’t on rushing through support tickets or chasing resolution numbers. It’s about having the technical knowledge, ownership and attention to detail to investigate issues thoroughly and deliver solutions that work.

They’re looking for someone who enjoys being hands‑on, has confidence in their technical ability and wants to settle into a business where they can make a genuine long‑term contribution.

As a Senior Infrastructure Engineer, you’ll take ownership of more complex technical issues across customer infrastructure, networking, Windows environments and security systems.

You’ll act as a senior technical resource within the team, troubleshooting escalated problems, managing infrastructure changes and ensuring customer environments remain secure, reliable and well maintained.

The role offers plenty of variety, from investigating network and firewall issues through to supporting Windows Server environments, Active Directory, Group Policy and wider infrastructure projects.

You’ll also have the opportunity to work with Microsoft 365, SharePoint and cloud-based technologies, although extensive cloud experience isn’t a prerequisite.

If you’ve built your career around traditional on‑premise infrastructure, networking, systems administration or a mixture of these technologies, your experience could be highly relevant.

The key is having genuine technical depth, understanding the systems you’re working with and being comfortable taking responsibility for resolving complex issues.

Previous MSP experience isn’t essential. We’d be equally interested in engineers who have worked within internal IT or infrastructure teams and have developed strong technical ownership of their environments.

• Strong hands‑on experience in Infrastructure Engineering, Systems Engineering, 3rd Line Support or a similar technical role
• Solid understanding of Windows Server environments and Active Directory
• Good networking knowledge, including DNS, DHCP, TCP/IP, VLANs and routing fundamentals
• Experience troubleshooting complex infrastructure or network issues
• Practical understanding of firewalls, network security and connectivity
• Experience managing or troubleshooting Group Policy
• Ability to investigate technical issues, identify root causes and implement appropriate solutions
• Confidence taking ownership of technical escalations and working independently
• Strong communication skills and the ability to explain technical issues to customers and colleagues
• A methodical approach to troubleshooting and an emphasis on delivering quality technical solutions
• Able to work onsite in Wimbledon five days per week
• Interested in building a long‑term career within an established technical business

• Fortinet, Forti Gate or other enterprise firewall technologies
• Microsoft 365, SharePoint, Azure or Intune
• Virtualisation technologies such as VMware or Hyper‑V
• Scripting or automation experience
• Security incident investigation and root cause analysis
• Previous MSP or managed IT services experience

We’re not looking for someone who simply has an extensive list of technologies on their CV. We’re interested in engineers who can demonstrate a genuine understanding of the systems they’ve worked with, explain how they’ve applied that knowledge and take ownership when things go wrong.

Senior Infrastructure Engineer, Infrastructure Engineer, 3rd Line Support, Systems Engineer, IT Systems Engineer, Windows Server, Active Directory, Group Policy, Networking, Firewalls, VLANs, DNS, DHCP, TCP/IP, Network Security, Microsoft 365, IT Infrastructure