Infrastructure Engineer

About the Role

We are looking for an Infrastructure Engineer to join a growing technology team in London, supporting and developing a Microsoft-based hybrid infrastructure environment.

The role will focus on maintaining and improving on-premises Windows Server infrastructure alongside Microsoft Azure services. You will work across cloud infrastructure, virtualisation and identity management, ensuring systems remain secure, reliable and highly available.

This is a hands-on opportunity for an Infrastructure Engineer with a strong Microsoft infrastructure background who is looking to develop their Azure expertise and take greater ownership of the systems they support.

Key Responsibilities

• Administer and maintain Windows Server infrastructure across on-premises and Azure environments.

• Manage Active Directory and Microsoft Entra ID, including identity synchronisation, authentication and access management.

• Support Microsoft Azure infrastructure, including virtual machines, networking, storage and identity services.

• Maintain Hyper-V virtualisation environments, including Windows Failover Clustering and performance optimisation.

• Monitor infrastructure performance, investigating and resolving server, networking and connectivity issues.

• Manage infrastructure patching, upgrades, maintenance and security improvements.

• Develop PowerShell scripts to automate routine administration and improve operational efficiency.

• Support infrastructure resilience, including backup, disaster recovery and availability processes.

• Work alongside development teams to support application hosting and infrastructure deployments.

Essential Requirements

• 3-5 years' experience working within an Infrastructure Engineer, Systems Administrator or similar position.

• Strong hands-on experience with Microsoft Windows Server environments.

• Practical experience administering Microsoft Azure, particularly virtual machines, networking, storage and identity services.

• Experience managing Active Directory and Microsoft Entra ID.

• Hands-on experience with Hyper-V virtualisation and Windows Failover Clustering.

• Good understanding of networking fundamentals, including TCP/IP, DNS, DHCP, VPNs and firewalls.

• Experience using PowerShell for scripting and infrastructure automation.

• Strong troubleshooting skills, with the ability to investigate and resolve infrastructure issues independently.

Desirable Experience

• Experience with Fortinet firewall technologies.

• Exposure to Infrastructure as Code tools such as Terraform, Bicep or ARM templates.

• Familiarity with Azure DevOps or GitHub Actions and CI/CD pipelines.

• Knowledge of backup, disaster recovery and infrastructure security best practices.

• Familiarity with ISO 27001 or Cyber Essentials Plus.

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

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