Senior Engineer - Enterprise Infrastructure

We are working with a large global organisation delivering critical digital and network services, currently undergoing a significant infrastructure modernisation programme. As part of this work, they are seeking a Senior Infrastructure Engineer to act as a deep technical specialist across enterprise infrastructure platforms.

This role will suit a highly skilled engineer who enjoys operating as a technical subject matter expert, solving complex infrastructure challenges while helping drive platform stability, automation, and security improvements across a large-scale enterprise environment.

You will act as a senior technical authority across core infrastructure services including Windows Server, VDI/Citrix platforms, Microsoft 365, and enterprise cloud environments. Working closely with infrastructure, security, and architecture teams, you will contribute to the design, stabilisation, and continuous improvement of critical enterprise platforms.

This role is highly hands-on and will involve supporting complex incidents, driving automation initiatives, and contributing to infrastructure architecture and transformation projects., * Act as a senior SME across enterprise infrastructure platforms including Windows Server, Citrix, VDI, Microsoft 365, and cloud environments

• Provide advanced troubleshooting and root cause analysis for complex infrastructure incidents
• Support infrastructure hardening and operational resilience initiatives
• Define and implement best practices for infrastructure security, governance, and operational standards

Infrastructure Operations

• Support the stability and performance of Windows Server environments and identity infrastructure
• Maintain enterprise VDI and Citrix platforms
• Support Microsoft 365 services including Exchange Online, Teams, and SharePoint
• Ensure strong governance and operational standards across enterprise cloud environments

Automation & Platform Improvement

• Drive automation initiatives using scripting and infrastructure-as-code approaches
• Contribute to standardisation of infrastructure provisioning and operational processes
• Identify opportunities to improve efficiency, reduce operational overhead, and strengthen security posture

Project Delivery

• Contribute to infrastructure projects from design through to implementation
• Collaborate with architecture, security, and platform teams to deliver scalable, secure solutions
• Provide technical expertise for infrastructure modernisation initiatives

Operational Support

• Participate in the infrastructure on-call rota supporting priority incidents where required

• Windows Server (2016/2019/2022)
• Active Directory, Group Policy, DNS, DHCP, PKI
• Citrix Virtual Apps & Desktops / enterprise VDI platforms
• Microsoft 365 (Exchange Online, Teams, SharePoint)
• Azure and enterprise cloud platforms
• Infrastructure automation (PowerShell, Terraform)
• VMware environments (working knowledge), * Strong hands-on experience with enterprise Windows Server environments
• Deep knowledge of Active Directory and identity infrastructure
• Experience supporting Citrix or VDI platforms in enterprise environments
• Experience working with Microsoft 365 services and identity platforms
• Exposure to Azure and modern cloud infrastructure environments
• Strong troubleshooting and root cause analysis capabilities
• Experience automating infrastructure operations using scripting or IaC tools
• Ability to operate as a senior technical SME within complex enterprise environments

Experience supporting infrastructure recovery, stabilisation, or remediation following major operational or security incidents would be highly valuable., * Strong likelihood of extension

• Remote-first working with occasional travel to London
• Opportunity to work on a large-scale enterprise infrastructure transformation programme