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# Senior IT Systems Engineer

- **Company:** Seymour John
- **Location:** Doncaster, United Kingdom
- **Experience:** Expert
- **Salary:** £65,000 - £78,000
- **Contract:** Temporary contract
- **Skills:** Microsoft Windows, Active Directory, Microsoft Azure, Cloud Computing, Data Centers, Dynamic Host Configuration Protocol, Domain Name System (DNS), Internet Information Services (IIS), Microsoft Software, Windows Servers, Software Deployment, Virtualization Technology, VMware VSphere, Cloud Platform System, Microsoft InTune, Information Technology, Network Server
- **Published:** October 30, 2026
- **Apply:** https://www.reed.co.uk/jobs/senior-it-systems-engineer/57505268

## About the Role

Proven experience in Level 3 support for enterprise infrastructure, including servers, storage, and core applications.

In-depth knowledge of Microsoft Active Directory, DNS, DHCP, Group Policy, and IIS.

Strong understanding and hands-on experience with Windows Server (2016/2019/2022) environments.

Experience in managing and supporting Microsoft Intune and Mobile Device Management (MDM) platforms.

Experience with virtualisation platforms such as VMware vSphere or Microsoft
Skills

 * Are you happy to work onsite

## Description

Provide 3rd Line Support for the ICT Service across infrastructure components including Servers, Storage, Application Deployment, Data Centre systems, Microsoft 365, Azure Cloud Services, and Enterprise Mobility Management (e.g., Intune, MDM).

Diagnose and resolve complex infrastructure-related incidents involving services such as Microsoft Active Directory, DNS, DHCP, IIS, Group Policy, and cloud-integrated systems

Monitor, respond to, and remediate infrastructure faults, outages, and performance issues across on-premise and cloud-based platforms.

Remote patches and Software deployments on Servers and Endpoints using PDQ\Intune

Maintain up-to-date infrastructure documentation, network/server diagrams and other infrastructure components.

Liaise with the ICT Service Desk to resolve infrastructure outages. Create and maintain comprehensive user and technical documentation for core systems including server infrastructure, Intune profiles, MDM policies, and cloud configurations.