Senior Platform Engineer

Location: Hybrid – 60% onsite, primarily Milton Keynes (some London)

IR35: Inside IR35

Security Clearance: Current DV Clearance – Essential

Role Overview

We are seeking an experienced Senior Platform Engineer to support secure, enterprise‑scale infrastructure across Microsoft Azure and on‑premises environments .

The role focuses on Azure infrastructure, Azure Arc, Azure Monitor/AMA, Windows and Linux administration, networking, endpoint security/XDR and automation . You will work closely with Infrastructure, Cyber Security and Operations teams to maintain resilient, secure and highly available platforms.

Key Skills & Experience

• Azure & Hybrid Infrastructure: Strong Azure administration with hands‑on experience deploying and managing Azure Arc‑enabled servers , subscriptions, resource groups, RBAC and hybrid infrastructure.
• Monitoring & Observability: Experience with Azure Monitor Agent (AMA), Log Analytics, Data Collection Rules (DCRs) , dashboards, alerting and infrastructure monitoring across Windows and Linux.
• Endpoint Security/XDR: Hands‑on deployment and support of XDR/EDR agents across enterprise Windows and Linux estates, including troubleshooting onboarding, connectivity and agent health.
• Windows & Linux: Strong enterprise server administration covering Windows Server, Active Directory, DNS, DHCP, Group Policy, certificates , alongside Linux services, packages, SSH, storage, patching and hardening.
• Networking: Strong TCP/IP and enterprise networking knowledge including DNS, routing, firewalls, proxies, VPNs and load balancers , plus Azure VNets, NSGs, Azure Firewall, VPN Gateway, ExpressRoute and Private Endpoints.
• Automation & IaC: Experience with PowerShell, Bash and Infrastructure as Code , ideally using Terraform, Bicep or ARM templates, with a focus on automating deployment, validation and operational tasks.

Additional Experience

Experience with Microsoft Defender XDR, CrowdStrike, SentinelOne, Cortex XDR, Intune, SCCM, Ansible, Terraform, Bicep, Entra ID, Defender for Cloud, CI/CD, DevOps or ITIL would be advantageous.

• Current DV Security Clearance
• 5+ years' experience in Platform, Infrastructure, Cloud Engineering or Systems Administration
• Strong hands‑on Azure and hybrid infrastructure experience
• Enterprise Windows and Linux administration
• XDR/EDR deployment and support experience
• Strong networking and troubleshooting skills
• PowerShell and Bash scripting experience
• Excellent communication and stakeholder management skills
• Strong focus on security, reliability and operational excellence

Please note: This is a hands‑on engineering role within a complex, secure enterprise environment, with DV clearance essential .