IT System Engineer - (Patch Management) Location: London - E16, UK (Hybrid - Office, Customer Sites and Remote) Employment Type: Full-Time Reports To: Lead System Engineer Role Overview We are seeking a skilled and proactive IT System Engineer to join our London-based infrastructure team. The successful candidate will be responsible for the delivery of patch management services and the hands-on installation of updates, upgrades, patches, and hotfixes across enterprise environments. This role is both customer-facing and internally focused, requiring work at our London office, remote support, and on-site visits to Network Rail and TfL customer locations across Greater London and surrounding areas. The position requires strong technical capability, excellent documentation skills, and a professional approach when operating within client environments. Key Responsibilities Patch and Update Management - Plan, test, schedule and deploy patches, updates, service packs, upgrades, and hotfixes. - Manage structured patch cycles (monthly, emergency, zero-day response). - Perform pre-deployment testing and post-implementation testing and validation. - Maintain patch compliance reporting and remediation tracking. - Ensure minimal disruption to production systems. OS Infrastructure - Updates to various Linux distributions, Ubuntu, Debian, Red Hat etc. - Updates to Windows Server (2016/2019/2022) and Windows 10/11 environments. - Configure and administer WSUS. Network and Security Infrast