IT- Infrastructure Engineer

Company: Gardiner & Theobald
Apply for the IT- Infrastructure Engineer
Location: London
Job Description:

Overview

In this role you help plan, operate and secure the firm’s core IT infrastructure. You will be the first escalation point for infrastructure issues and work across end-user platforms, cloud services and network components to keep services running smoothly. You’ll partner with IT security and Service Desk to resolve incidents and implement improvements. This is a hands-on, cross-functional role in a forward‑looking, ESG‑minded firm where technology enables safer, more efficient delivery of projects.

Responsibilities

  • Administer Microsoft 365, Intune and Entra ID including Teams and telephony
  • Manage patching and software deployment
  • Support Azure Virtual Desktop
  • Assist with network switching, wireless and firewall infrastructure
  • Diagnose connectivity, performance and VPN issues
  • Perform routine network and firewall changes
  • Collaborate with Service Desk on escalated incidents and knowledge transfer
  • Triaging infrastructure alerts and incidents
  • Support Windows Server and Active Directory
  • Maintain technical documentation and runbooks

Key requirements

  • Proven experience in infrastructure engineering or advanced 2nd/3rd line role
  • Strong Microsoft 365, Intune and Entra ID administration
  • Solid networking knowledge (TCP/IP, DNS, DHCP, VLANs, VPN) and troubleshooting
  • Experience with enterprise switching and firewall platforms
  • Experience supporting Windows desktop and server environments (on-prem and cloud)
  • PowerShell scripting experience
  • Structured troubleshooting approach and issue resolution
  • Security-conscious approach to infrastructure administration
  • Excellent written and verbal communication skills
  • Strong communication skills
  • Collaborative mindset
  • Problem-solving orientation
  • Microsoft 365
  • Intune
  • Entra ID

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Posted: October 10th, 2026