Senior Infrastructure Engineer

Senior Infrastructure Engineer Location: Milton Keynes / London | Hybrid Salary: Competitive Day Rate Overview: First Military Recruitment are currently seeking a Senior Infrastructure Engineer on behalf of one of our clients. We are seeking an Engineer with strong Azure, Windows Server, Linux, networking and endpoint security experience to support enterprise infrastructure platforms across on-premises and cloud environments. The role will focus on deploying and supporting XDR agents, Azure Arc onboarding, Azure Monitor Agent (AMA) installations, infrastructure monitoring and maintaining secure, reliable platform services across Windows and Linux server estates. Our client encourages applications from ex-military personnel however all candidates will be given due consideration. Duties and Responsibilities: Deploy, configure and support Microsoft Azure infrastructure services. Install and onboard Windows and Linux servers to Azure Arc. Configure and manage Azure Arc-enabled servers and associated extensions. Support Azure resource management, subscriptions, resource groups and RBAC permissions. Assist with hybrid cloud integration and infrastructure modernisation initiatives. Install, configure, and troubleshoot Azure Monitor Agent (AMA) on Windows and Linux servers. Configure Azure Monitor, Log Analytics Workspaces, Data Collection Rules (DCRs), dashboards and alerting solutions. Monitor infrastructure performance, availability, capacity and security events. Support operational monitoring and reporting across enterprise environments. Deploy, configure, upgrade and maintain XDR/EDR agents across Windows and Linux server environments. Perform large-scale security agent rollouts using automated deployment methods. Troubleshoot agent installation, connectivity, onboarding and performance issues. Ensure endpoint security agents remain compliant and operational across the server estate. Support security operations teams with endpoint protection and monitoring requirements. Install, configure, administer and maintain Windows Server environments. Manage Active Directory, DNS, DHCP, Group Policy and certificate services. Perform server patching, upgrades, security hardening and lifecycle management. Troubleshoot operating system, application and infrastructure issues. Install, configure, administer and maintain Linux server environments. Manage system services, package repositories, storage, user access, and SSH configurations. Perform Linux patching, upgrades, and security hardening activities. Troubleshoot operating system, application, and networking issues. Configure and troubleshoot TCP/IP networking in on-premises and Azure environments. Support DNS, routing, firewalls, load balancers, VPNs and proxy services. Troubleshoot connectivity issues affecting Azure Arc, Azure Monitor Agent, and XDR agent communications. Support Azure networking technologies including. Automate operational tasks using PowerShell and Bash scripting. Support Infrastructure as Code (IaC) initiatives using Terraform, Bicep or ARM templates. Develop deployment and validation scripts for Azure Arc, Azure Monitor Agent and XDR solutions. Maintain technical documentation, standards and operational procedures. Implement security best practices and hardening standards across Windows and Linux platforms. Support vulnerability remediation, compliance initiatives and security audits. Investigate infrastructure and endpoint security alerts. Work closely with Cyber Security, Infrastructure and Operations teams to maintain secure platforms. Skills and Qualifications: Bachelor's degree in Information Technology, Computer Science, Cyber Security or equivalent experience. 5+ years of experience in Platform Engineering, Infrastructure Engineering, Cloud Engineering, or Systems Administration. Experience supporting enterprise Windows and Linux server environments. Strong Microsoft Azure administration and support experience. Hands-on experience installing and managing Azure Arc-enabled servers. Experience deploying and supporting Azure Monitor Agent (AMA). Experience deploying and supporting XDR/EDR security agents. Strong Windows Server administration skills. Strong Linux server administration skills. Knowledge of Active Directory, DNS, DHCP and Group Policy. Strong networking fundamentals including TCP/IP, DNS, routing, VPNs, firewalls and proxies. Experience with PowerShell and Bash scripting. Experience with Azure Monitor, Log Analytics and infrastructure monitoring solutions. Strong troubleshooting and analytical skills. Excellent communication and stakeholder management abilities. Ability to work independently and within cross-functional teams. Strong focus on security, reliability and operational excellence. Proactive approach to automation, monitoring and continuous improvement. DV Security Clearance. Desirable: Experience with Microsoft Defender XDR, CrowdStrike, SentinelOne, Cortex XDR, or equivalent platforms. Experience with Microsoft Intune, SCCM, Ansible or other deployment tools. Experience with Terraform, Bicep, or ARM templates. Knowledge of Microsoft Entra ID and Defender for Cloud. Familiarity with DevOps practices and CI/CD pipelines. Understanding of ITIL service management processes.