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IT- Infrastructure Engineer

Job in London, Greater London, W1B, England, UK
Listing for: Gardiner & Theobald
Full Time, Per diem position
Listed on 2026-10-16
Job specializations:
  • IT/Tech
    Systems Administrator
Job Description & How to Apply Below
Why G&T?

Gardiner & Theobald is an independent construction and property consultancy committed to providing world class service to our clients.  Our dedicated team of over 1,300 people delivers Cost Management, Project Management and Specialist Consultancy services from a network of UK and US offices bound by a common purpose - to build a better tomorrow.

We define our success by the value we create for our clients, the fulfilling careers we build for our people and our contribution to the communities we work in. Our own long-term business performance aligns profit with purpose, taking social and environmental responsibility for our actions and the legacy we leave behind.

People are central to our mission. Rewarding individuals based on their unique abilities, talent and hard work, we believe in the quality of experiences and investing in a collaborative culture where all can thrive. About the Role We are recruiting an IT Infrastructure Engineer to join our IT Infrastructure & Security team.

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.

Key responsibilities

Administering Microsoft 365, Intune and Entra , 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. About You Essential Experience Proven experience in an infrastructure engineering or advanced 2nd/3rd line role Strong Microsoft 365, Intune and Entra  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 Power Shell scripting experienceA structured troubleshooting approach and the ability to see issues through to resolutionA security-conscious approach to infrastructure administration

Excellent written and verbal communication skills

Desirable experience

Cisco CCNA and/or Fortinet NSE4/FCP certificationVMware vSphere

Experience with enterprise security tooling and security best practices

About UsForward thinking and future focused, we champion social mobility, ethical governance, equality and diversity, creating an inclusive environment where everyone’s unique talents and experiences are valued. Our ESG goals are at the forefront of our business plan, and we are proud to have created social value worth over 19m+ since 2021. Our initiatives include the G&T ESG Committee, dedicated to increasing opportunities and removing barriers for social mobility and equality within the firm, as well as our Next Gen programme which focuses on nurturing the next generation in the industry.

Our commitment to realising a more sustainable future is witnessed not only through helping our clients meet their own next zero carbon aspirations but also by reaching our own, with an aim for our firm to be net zero by 2030.Department IT

Employment Type

Full Time Workplace type Onsite
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