> Markdown version of [/jobs/ext/3602364-it-infrastructure-engineer](https://www.wearedevelopers.com/jobs/ext/3602364-it-infrastructure-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# IT- Infrastructure Engineer

- **Company:** Gardiner and Theobald
- **Location:** London, UK
- **Salary:** £41,756.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Microsoft Azure, Cloud Computing, Dynamic Host Configuration Protocol, Domain Name System (DNS), Virtual Private Networks (VPN), Windows Servers, Virtual Desktops, Windows PowerShell, Software Deployment, TCP/IP, Virtual Local Area Networks, VMware VSphere, Windows Desktop, Network Switches, Firewalls (Computer Science), Microsoft InTune, Information Technology, Fortinet, Cisco, Server Operating Systems & Platforms
- **Published:** October 7, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5916623190

## About the Role

* Proven experience in an infrastructure engineering or advanced 2nd/3rd line role
 * Strong Microsoft 365, Intune and Entra ID administration experience
 * Strong networking knowledge, including TCP/IP, DNS, DHCP, VLANs and VPNs, with the ability to troubleshoot complex connectivity issues
 * Experience with enterprise switching and firewall platforms
 * Experience supporting Windows desktop and server environments across on-premises and cloud-hosted infrastructure
 * Practical PowerShell scripting experience
 * A structured troubleshooting approach and the ability to see issues through to resolution
 * A security-conscious approach to infrastructure administration
 * Excellent written and verbal communication skills

Desirable experience

 * Cisco CCNA and/or Fortinet NSE4/FCP certification
 * VMware vSphere
 * Experience with enterprise security tooling and security best practices

## Description

This is a hands-on generalist role covering endpoint management, Microsoft 365, identity, networking and infrastructure support. You will administer a range of core infrastructure platforms and act as the first IT infrastructure escalation point for the Service Desk., * Administering Microsoft 365, Intune and Entra ID, including Microsoft Teams and telephony

 * Managing patching and software deployment
 * Supporting Azure Virtual Desktop
 * Supporting network switching, wireless and firewall infrastructure
 * Diagnosing and resolving connectivity, performance and VPN issues
 * Carrying out routine network and firewall changes
 * Working closely with the Service Desk on escalated incidents, providing technical support and knowledge transfer
 * Triaging infrastructure alerts and incidents
 * Supporting Windows Server and Active Directory
 * Maintaining technical documentation and operational runbooks

Shift pattern
Please note this role will operate on normal office hours (Mon-Fri 9am-5:30pm), and on call (evenings and weekends) 1 week in every 4.