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G&T London

IT- Microsoft 365 & Systems Administrator

Gardiner and Theobald LLP
Office & Professional
Office & Professional
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Description

Location
G&T London

Hours
Monday to Friday, 9am to 5:30pm with 4 days in the office and 1 day remote each week. On call (evenings and weekends) 1 week in every 4.

Salary
Negotiable

About the Role
Gardiner & Theobald LLP is an independent construction and property consultancy committed to delivering world-class service to clients. Our team of over 1,300 people provides Cost Management, Project Management and Specialist Consultancy services across UK and US offices, united by a purpose to build a better tomorrow. We value the contribution of our people and invest in a collaborative culture where all can thrive.

We are recruiting a Microsoft 365 & Systems Administrator to join our IT Infrastructure & Security team. This role focuses on the administration and support of our Microsoft cloud and endpoint environment, including Microsoft 365, Entra ID and Intune, alongside supporting infrastructure, security and management platforms. You will act as the escalation point within the team for technical issues raised by the Service Desk, resolving core platform issues and escalating complex work to Senior Infrastructure Engineers as needed.

Key responsibilities include:
- Administering Microsoft 365, Entra ID, Microsoft and SharePoint Online
- Managing endpoint configuration, compliance policies and application deployment
- Supporting Windows 11 endpoint management
- Managing patching and third-party software deployment
- Supporting application control and security tooling
- Supporting Conditional Access, authentication and identity-related configuration
- Administering Entra ID users, groups, enterprise applications and access
- Supporting Microsoft Teams and Azure Virtual Desktop
- Troubleshooting Microsoft 365, endpoint, identity, authentication and application issues
- Using PowerShell for administration, troubleshooting and automation
- Acting as escalation point for Service Desk incidents, providing technical support and knowledge transfer
- Triaging infrastructure, platform and security alerts and incidents
- Maintaining technical documentation and operational runbooks
- Supporting and administering other business and infrastructure platforms
- Assisting with platform changes, upgrades and improvements

Requirements

Experience
- Demonstrable experience in systems administration, Microsoft 365, endpoint management or advanced IT support
- Hands-on administration experience within a predominantly Microsoft environment
- Strong experience administering Microsoft 365 including SharePoint Online
- Strong experience with Microsoft Entra ID and Microsoft Intune
- Experience with Windows endpoint management, endpoint configuration, compliance policies and application deployment
- Good understanding of Conditional Access, authentication and identity management
- Experience troubleshooting Microsoft 365, endpoint and identity-related issues
- Practical PowerShell experience for administration or automation
- Good general IT infrastructure knowledge including networking fundamentals such as TCP/IP, DNS and DHCP
- Structured approach to troubleshooting with ability to resolve technical issues
- Security-conscious approach to administration
- Excellent written and verbal communication skills
- Collaborative approach to support, working closely with Service Desk colleagues and sharing technical knowledge

About You
Forward thinking and future focused, you value social mobility, ethical governance, equality and diversity. You thrive in an inclusive environment where unique talents and experiences are valued. You are motivated to contribute to a sustainable future and align with our firm’s commitment to social and environmental responsibility.

Qualifications
- Microsoft certifications such as SC-300, MD-102 or AZ-104 are desirable
- Experience with Microsoft Defender or other enterprise security tooling
- Familiarity with application control or endpoint security platforms
- Experience with patch management and software deployment platforms
- Knowledge of hybrid Active Directory / Entra ID environments
- Windows Server administration experience
- Understanding of enterprise networking, switching, firewalls or VPN technologies

Expiry date: 11/12/2026
IT- Microsoft 365 & Systems Administrator
Company:
Gardiner and Theobald LLP
Job Type:
Full-time
Location:
G&T London